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Retail Knowledge - Glossary
Retail Knowledge Glossary
85 retail and Enactor-specific terms used across Retail Knowledge articles. Each entry shows the definition and which articles reference it. Hover the green-underlined terms in any article to see a definition tooltip - click them to land here.
A
Anchoring Effect
promotions
A cognitive bias, documented by Tversky and Kahneman (1974), describing the human tendency to rely heavily on the first numerical value encountered when making a judgement. In retail pricing, the original or RRP price displayed alongside a promotional price serves as the anchor against which the discounted price is evaluated. The Williams-Sonoma bread-maker case is a canonical illustration: introducing a more expensive model increased sales of the existing model through anchoring alone, with no change to the lower price.
APNs (Apple Push Notification Service) (APNs)
platform
Apple's infrastructure service for delivering push notifications and pass update triggers to iOS devices, used by pass management platforms to notify Apple Wallet of pass changes. APNs is provided free by Apple with no per-notification charge and no volume caps. It is not a marketing push notification system - it is the technical delivery mechanism for pass refresh triggers.
Used in: Nfc Wallet Passes
Apple VAS (Value Added Services) (VAS)
payments
Apple's proprietary NFC protocol that allows loyalty passes, membership cards, and coupons stored in Apple Wallet to be read at a payment terminal alongside an Apple Pay transaction. VAS operates as a layer on top of the NFC contactless interaction. When a customer taps their iPhone or Apple Watch to pay, the VAS protocol can simultaneously transmit loyalty pass data to the terminal in the same interaction. VAS requires a separate NFC Entitlement certificate from Apple, which must be applied for and approved before passes with NFC capability can be issued. Only VAS-certified terminals can read Apple Wallet loyalty passes via NFC - Apple Pay acceptance alone is not sufficient.
Used in: Nfc Wallet Passes
B
Behavioural Micro-Segmentation
loyalty
A customer segmentation approach that groups customers based on observed behavioural patterns - category affinity, promotional response type, channel preference, purchase cadence, and lifecycle signals - rather than simple transaction metrics. Produces actionable archetypes such as Category Loyalist, Discount Hunter, Near-Tier Customer, and Lapsed Seasonal, each requiring a distinct promotional mechanic. More predictive than RFM, but requires richer data and more frequent refresh cycles.
Breakage
loyalty
In a loyalty programme context, the proportion of issued rewards - points, vouchers, or other incentives - that are never redeemed by customers before expiry or programme closure. Breakage reduces the eventual cash cost of a loyalty programme because unredeemed rewards do not need to be honoured, but high breakage is a signal of low programme engagement rather than a financial benefit. Breakage must be distinguished from its accounting/fiscal use, where it refers to unused gift cards recognised as revenue after a statutory period.
Used in: Loyalty Promotions Integration
Buy Online, Pick Up In Store (BOPIS)
operations
A fulfilment model in which a customer completes a purchase transaction online and collects the goods from a designated physical store location. The promotional calculation and payment are made at the online checkout; the in-store collection is a separate fulfilment event, not a new transaction. Between 47% and 85% of BOPIS customers make additional in-store purchases when collecting. BOPIS is the US-originated term; click-and-collect is the more commonly used term in UK retail.
Used in: Omnichannel Promotions Consistency
C
Channel Scope
promotions
A promotion configuration parameter that explicitly defines which sales and fulfilment channels a promotion is active on - manned POS, self-checkout, e-commerce, app, click-and-collect. In everyday language 'scope' suggests a general range; in promotion configuration it is a specific, enforceable parameter that must be set deliberately at configuration time. If channel scope is not defined, all channels may be treated as active by default, creating unintended promotional eligibility. Well-governed promotion design treats channel scope as a mandatory configuration field, not an optional one.
Used in: Omnichannel Promotions Consistency
Channel-Specific Eligibility
promotions
A promotion configuration in which the qualifying product set, customer eligibility conditions, or discount terms differ depending on the channel through which the customer purchases. Channel-specific eligibility is legitimate when it reflects genuine operational constraints - for example, fresh food excluded from online promotions for fulfilment reasons - but creates a consistency problem when it arises from configuration oversight rather than deliberate commercial design. Channel-specific exclusions should be explicitly communicated to customers at the time of offer presentation, not discovered as a surprise at checkout.
Used in: Omnichannel Promotions Consistency
Click-and-Collect (C&C)
operations
The UK-standard term for a fulfilment model in which a customer purchases online and collects goods from a physical store or designated collection point. The UK click-and-collect market is worth over £42.4 billion, accounting for more than 8% of total UK retail annual income. Click-and-collect is the preferred UK terminology for what US markets call BOPIS (Buy Online, Pick Up In Store). The collection event is a fulfilment step, not a new transaction - but it creates a high-intent in-store moment with significant incremental basket opportunity.
Used in: Omnichannel Promotions Consistency
CLV:CAC Ratio
loyalty
The ratio between Customer Lifetime Value and Customer Acquisition Cost, used as the primary benchmark for evaluating whether marketing investment is commercially sustainable. A ratio of 3:1 - meaning the customer generates three times the cost of their acquisition over their lifetime - is the widely cited minimum viable threshold. Ratios below 3:1 indicate unsustainable acquisition economics. In everyday language 'ratio' implies a neutral comparison; in this marketing context it is a specific governance threshold that should trigger intervention when breached.
Cohort Analysis
loyalty
A method of analysing customer behaviour by grouping customers who share a common characteristic at a defined point in time - typically their first purchase date or enrolment date - and tracking the group's behaviour over subsequent periods. Used to measure CLV accurately across acquisition cohorts, identify retention rate patterns, and separate seasonal purchase behaviour from genuine engagement trends. A reliable CLV baseline requires at least 12 months of cohort data with seasonal normalisation applied.
Counterfactual
promotions
In promotion measurement, the estimated state of what would have happened - specifically, what revenue or sales volume would have been generated - had the promotion not run. The counterfactual is the baseline against which all incremental measurement is conducted. In everyday language and philosophy, a counterfactual is a hypothetical statement about what might have been; in statistical measurement it is a specific, formally constructed estimate produced through control group design (holdout testing), geographic matching, or statistical modelling (MMM). The credibility of any incrementality claim depends entirely on the credibility of its counterfactual.
Cross-Channel Voucher
operations
A voucher that is redeemable across multiple sales channels - for example, a voucher issued via email or app that is also redeemable at a manned POS terminal or SCO unit. Cross-channel voucher validity requires a shared voucher validation database or service accessible from all channels, as well as consistent serial number tracking to prevent duplicate redemption. Without cross-channel validity, a customer who receives a digital voucher and attempts to redeem it in-store will encounter friction that damages trust.
Used in: Omnichannel Promotions Consistency
Customer Acquisition Cost (CAC)
loyalty
The total marketing and sales investment required to acquire a single new customer. Acquiring a new customer typically costs approximately five times more than retaining an existing one. The CLV:CAC ratio of 3:1 is the minimum viable benchmark for sustainable marketing investment - a customer must generate at least three times the cost of their acquisition over their lifetime for the acquisition to be commercially justified.
Customer Data Platform (CDP)
platform
Software that collects first-party customer data from multiple sources - POS, web, app, CRM, loyalty - and unifies it into persistent, individual customer profiles accessible to marketing systems. CDPs enable marketers to build and activate segments across channels, and provide the data foundation for personalisation, CLV modelling, and AI-driven targeting. CDPs are distinct from CRMs (which manage customer relationships) and DMPs (which handle anonymous third-party audience data).
Customer Lifetime Value (CLV)
loyalty
The total net profit expected from a customer over the full duration of their relationship with the retailer. Used as the primary strategic lens for deciding how much to invest in acquiring, retaining, and developing individual customer segments. CLV-based segmentation is forward-looking - it estimates future value and uses that estimate to prioritise promotional investment, rather than simply describing past behaviour. A CLV:CAC ratio of 3:1 is the widely cited minimum viable benchmark for marketing investment.
Customer Price Group (CPG)
loyalty
In Enactor, a configuration entity that assigns a pricing profile to a customer record. When a customer belongs to a Customer Price Group, they receive prices associated with that group rather than standard retail prices. Customer Price Groups are the mechanism by which loyalty tier status translates into differentiated pricing at POS - each loyalty tier can be configured with a Default Customer Price Group, meaning advancement to a higher tier automatically adjusts a customer's pricing profile.
Used in: Loyalty Promotions Integration
D
Data (Use and Access) Act 2025 (DUA 2025)
fiscal
UK legislation that received Royal Assent on 19 June 2025, amending elements of the UK data protection and digital identity framework. The Act has caused the ICO to place several areas of guidance under review, including guidance on marketing personalisation, consent, and online tracking. Retailers operating segmentation and personalisation programmes should monitor ICO publications for updated guidance issued under this Act, particularly regarding AI-driven processing and the Data (Use and Access) Act's provisions on data sharing.
Digital Markets, Competition and Consumers Act 2024 (DMCCA)
fiscal
UK legislation that came into force in April 2025, significantly expanding the Competition and Markets Authority's enforcement powers in relation to unfair commercial practices. Relevant provisions for retail promotions include: regulation of reference pricing (Was/Now claims must reflect genuine historical pricing); prohibition of misleading urgency claims and perpetually-resetting countdown timers; requirement that scarcity claims be substantiated; and prohibition of drip pricing. The CMA can now fine businesses up to 10% of global annual turnover without requiring a court order.
Drip Pricing
promotions
A pricing practice in which mandatory charges - such as booking fees, service charges, or delivery costs - are revealed progressively during the purchase journey rather than being included in the headline price presented at the outset. Prohibited under DMCCA 2024 in UK retail. In everyday language 'drip' suggests a gradual, harmless flow; in this regulatory context it describes a deceptive commercial practice. Also referred to as 'partitioned pricing' in academic literature.
Dual-Process Model
promotions
A model of human cognition, associated primarily with Daniel Kahneman's System 1 / System 2 framework, distinguishing fast, intuitive, emotional processing (System 1) from slow, deliberate, analytical reasoning (System 2). In promotional design, effective campaigns appeal to both modes: visual urgency cues and social proof for System 1 decisions, with detailed product information and substantiated claims for System 2 evaluators. Retailers who design only for System 1 response tend to experience elevated post-purchase regret rates and returns.
Dynamic Micro-Segmentation
loyalty
A targeting architecture in which customers are assigned to named behavioural cohorts - micro-segments - that can be updated at high frequency (daily, in real time, or event-triggered) based on purchase data, lifecycle stage, or CRM signals. Each micro-segment can be targeted with specific promotional mechanics. Dynamic micro-segmentation contrasts with static tier-based segmentation, which changes slowly based on accumulated spend. The mechanism that enables dynamic micro-segmentation in Enactor is Loyalty Groups.
Used in: Loyalty Promotions Integration
E
Endowment Effect
promotions
A psychological phenomenon, documented by Kahneman, Knetsch and Thaler (1990), in which people assign higher value to objects they own or feel entitled to than to identical objects they do not yet possess. In retail, the endowment effect is activated by loyalty points accrual (customers feel they own their points and are motivated to spend them), near-miss alerts (the customer feels entitled to the promotion they are close to triggering), and earned reward mechanics that make the customer feel they have already partially acquired the benefit.
Estate Manager Broadcast
platform
The Enactor mechanism by which configuration changes - including promotion rules, pricing, loyalty schemes, and product data - are pushed from Estate Manager (the central configuration system) to all connected POS terminals, SCO units, and other Enactor-connected in-store devices on a scheduled or triggered cycle. Broadcast ensures that all in-store channels execute from the same configuration simultaneously, making Estate Manager the single source of truth for in-store promotional execution.
Used in: Omnichannel Promotions Consistency
F
FCM (Firebase Cloud Messaging) (FCM)
platform
Google's infrastructure service for delivering push notifications and pass update triggers to Android devices, used by pass management platforms to notify Google Wallet of pass changes. FCM is provided free by Google with no per-message charge and no volume caps. Google also requires that after each SmartTap redemption, the POS system calls the Google Wallet API directly to update the pass object, independent of FCM.
Used in: Nfc Wallet Passes
G
Google SmartTap
payments
Google's NFC protocol that allows loyalty passes, coupons, and other pass types stored in Google Wallet to be read at a compatible payment terminal on Android devices. Unlike Apple VAS, SmartTap does not require a separate entitlement approval from Google - retailers can begin issuing SmartTap-capable passes once they have a compatible terminal and a pass management platform. After a SmartTap interaction, the POS must update the customer's pass with the new balance or status via the Google Wallet API.
Used in: Nfc Wallet Passes
Group Coverage Rate
promotions
An Enactor Promotion Intelligence Framework KPI (EFF-023) measuring the proportion of customers assigned to a targeted loyalty group who actually transacted during the promotional period as a proportion of total group membership. A low group coverage rate indicates that the group population may be stale (customers no longer active), too broadly defined, or that the promotion window was too short to capture the natural purchase cadence of that segment. Group coverage rate is a diagnostic metric for Loyalty Group targeting precision.
H
Halo Effect (Promotional)
promotions
In retail promotion measurement, the incremental sales uplift generated in non-promoted items because they are frequently purchased alongside a promoted item. When a promotion drives basket entry for a specific item, complementary items in the same basket may also show elevated sales - this adjacent uplift may be partly attributable to the promotion (a true halo) or simply a reflection of natural co-purchase patterns. Distinguishing true halo from natural basket composition requires comparing co-purchase rates during and outside of promotional periods.
Holdout Test
promotions
A controlled experiment in which a defined proportion of eligible customers or stores - typically 5-20% - is withheld from a promotion to serve as a control group. The purchasing behaviour of the holdout (control) group during the promotional period is compared to the behaviour of the treated group who received the promotion. The difference between the two groups is the incremental lift attributable to the promotion. Holdout testing is the most directly applicable methodology for individual promotion measurement at POS level and is considered the gold standard for causal attribution in promotion measurement.
I
Incremental Analysis
promotions
In a promotions or loyalty programme context, the process of measuring whether a promotional offer changed a customer's purchasing decision - specifically, whether a purchase would have occurred without the promotion. Conducted by comparing the behaviour of customers who received a promotion against a matched control group who did not. Without incremental analysis, a retailer cannot distinguish promotional spend that generated additional revenue from promotional spend that subsidised purchases already intended.
Used in: Loyalty Promotions Integration
Incremental ROAS (iROAS)
promotions
Incremental Return on Advertising Spend - the ratio of causally attributed incremental revenue to the cost of the promotional activity. Calculated as: incremental revenue (from holdout or MMM measurement) / promotional cost (discount value + promotional overhead). A median iROAS of 2.31x was found across 225 geo-based incrementality tests (Stella, 2025), meaning each pound of promotional spend generated £2.31 of truly incremental revenue. Distinct from gross ROAS, which uses total promotional-period revenue regardless of whether it was causally driven by the promotion.
Incrementality
promotions
In retail promotion measurement, the proportion of sales or revenue generated by a promotional activity that would not have occurred without it. Incrementality is the only commercially meaningful measure of promotional effectiveness - gross uplift during a promotional period includes both incremental sales and sales that would have happened anyway at full price. In everyday language 'incremental' means 'additional'; in this measurement context it specifically refers to causally attributable additional revenue, measured against a credible counterfactual baseline.
K
Known Value Item (KVI)
merchandising
A product whose price is actively compared and remembered by shoppers, meaning the retailer's price on this item disproportionately influences the customer's overall perception of store value and brand price image. Classic grocery KVIs include milk, bread, eggs, and bananas. KVIs are typically high-frequency, low-margin products where retailers price competitively at or near cost to drive store traffic and build a value reputation. McKinsey's retail pricing framework suggests sophisticated retailers apply KVI treatment to as little as 10-20% of SKUs.
L
Legitimate Interests (Lawful Basis) (LIA)
fiscal
One of six lawful bases for processing personal data under UK GDPR (Article 6(1)(f)). For retail loyalty programmes and in-store personalisation, legitimate interests is often the most appropriate basis - provided the retailer documents a Legitimate Interests Assessment (LIA) balancing the business need against customer rights and reasonable expectations. Consent under PECR remains required for electronic direct marketing regardless of which Article 6 basis applies to underlying data processing.
Loss Aversion
promotions
A behavioural economics principle, established within Prospect Theory (Kahneman & Tversky, 1979), stating that the psychological pain of losing a given amount is approximately twice as powerful as the pleasure of gaining an equivalent amount. In promotional design, loss aversion is activated by framing the end of a promotion as something the customer will lose - 'Your saving expires tonight' - rather than as a gain. Limited-time offers, countdown timers, and expiry-linked vouchers all derive their urgency from this mechanism.
Loyalty Groups
loyalty
A micro-segmentation mechanism within the Enactor Promotions Engine that allows customers to be assigned freely-definable group identifiers (such as LAPSED_60_DAY or NEAR_GOLD) via the REST API. Unlike loyalty tiers, group membership can change as frequently as needed and is not determined by accumulated spend or points. Promotions can be scoped to include or exclude specific group identifiers, enabling behavioural targeting independent of tier status.
Used in: Loyalty Promotions Integration
Loyalty Scheme
loyalty
In Enactor, a configured entity in Estate Manager that defines the complete structure of a loyalty programme: its tiers, earn rates, redemption rates, advancement thresholds, and POS behaviour. A Loyalty Scheme is the master configuration object that governs how points are accumulated and redeemed across all transactions. In everyday language 'scheme' suggests a plan or project; in this context it is a specific, persistent configuration record with a Scheme ID.
Used in: Loyalty Promotions Integration
Loyalty Tier
loyalty
A named status level within a loyalty scheme that a customer advances through as they accumulate qualifying spend or points. Each tier carries differentiated benefits - such as different earn rates, redemption rates, or customer price groups - and advancement is governed by a configurable Tier Promotion Strategy. Tiers change slowly and represent persistent programme status, as distinct from Loyalty Groups which can be updated at any frequency.
Used in: Loyalty Promotions Integration
M
Margin Floor
promotions
A configuration parameter applied to a promotion in the POS system that prevents the promotion from executing if doing so would result in the transaction margin falling below a defined minimum. Margin floor prevents sub-margin promotional execution caused by promotion stacking, misconfiguration, or edge cases in complex promotional logic. In everyday language 'floor' implies a minimum value; in this POS configuration context it is a specific, enforceable governance control that must be deliberately set per promotion to function. Not available in all POS systems - in Enactor, margin floor is a configurable parameter at the promotion level.
Margin Recovery
merchandising
The pricing strategy of taking measured price increases on products with low price elasticity - where customer demand is relatively insensitive to price changes - to recover margin invested in competitively priced KVI and promotional activity elsewhere in the assortment. Margin recovery products are typically low-frequency, low shopper price-awareness items where the customer does not actively compare prices. McKinsey's retail pricing framework estimates that 80-90% of the assortment is eligible for some degree of margin optimisation beyond the KVI or competitive tiers.
Marketing Mix Modelling (MMM)
promotions
A statistical regression technique that decomposes total sales into contributions from individual marketing and external factors - including promotional spend, seasonality, pricing, competitor activity, and macroeconomic conditions - using historical time-series data. MMM quantifies the contribution of each driver to total sales, enabling promotional budget allocation decisions across the portfolio. Requires 18-24 months of historical data and specialist modelling resource or external vendor. Identified as the most reliable measurement methodology by 27.6% of marketers (eMarketer/TransUnion, 2025).
Matched Market Test
promotions
An incrementality measurement methodology in which test markets (stores or geographic regions) run a promotion while pre-selected control markets of similar trading characteristics do not. The incremental lift is the performance gap between test and control markets, adjusted for known baseline differences. Matched market testing is appropriate for promotions that cannot be withheld from individual customers - such as in-store price reductions visible to all shoppers in a location. Median incremental ROAS across 225 tests was found to be 2.31x (Stella, 2025).
Member-Gated Pricing
promotions
A promotional mechanic in which a lower price is displayed on a product or shelf label but is only available to customers who are identified members of the retailer's loyalty programme at point of sale. Non-members pay the standard headline price. Used by major UK grocers - including Tesco Clubcard and Sainsbury's Nectar - to concentrate promotional spend on identified customers while protecting headline pricing and generating behavioural data for future targeting.
Used in: Loyalty Promotions Integration
N
National Living Wage (NLW)
fiscal
The UK government-mandated minimum hourly wage for workers aged 21 and over (as of April 2024), set annually by the Low Pay Commission and enacted via the National Minimum Wage Act 1998. The NLW rose 4.1% to £12.71 per hour from April 2026. For UK retailers, the NLW is the primary driver of direct labour cost inflation and is a key input to the pricing strategy business case for cost pass-through via measured price increases on inelastic products.
Near Miss Alert
promotions
A contextual message surfaced at POS when a customer is within a configurable spend threshold of a promotion trigger, informing them of the additional spend required to unlock a benefit. Activates both loss aversion (the customer is about to miss a saving) and the endowment effect (the customer feels entitled to the promotion they are approaching). Near Miss Alert is an Enactor capability (PRD019, in development). It enables basket-building uplift without discounting the current basket.
NFC (Near Field Communication) (NFC)
payments
NFC operates at 13.56 MHz and is built into virtually all modern smartphones. In retail contexts it underpins contactless payment (Apple Pay, Google Pay) and contactless loyalty pass reading. The same tap gesture used for payment can simultaneously read a loyalty pass using supplementary protocols such as Apple VAS or Google SmartTap. NFC is passive - it requires no battery in the tag or terminal antenna and activates only when devices are in proximity.
Used in: Nfc Wallet Passes
NFC Entitlement
platform
A certificate granted by Apple that authorises an issuer to create Apple Wallet passes with NFC functionality. The NFC Entitlement is a specific approval that Apple grants on a case-by-case basis, separate from the Apple Developer Programme membership. Apple reviews each application and may approve, deny, or request further information without providing a reason for refusal. If an entitlement is revoked, all NFC-enabled passes issued under that certificate will stop functioning immediately.
Used in: Nfc Wallet Passes
O
Offer Price
merchandising
A specific promotional price point at which a product is offered during a promotional period, displayed alongside the regular or RRP price to create an anchoring effect. In everyday language an 'offer price' simply means a sale price; in Enactor promotion configuration, 'Offer Price' is a specific promotion type that sets an absolute price point rather than a percentage discount - presenting the regular price as the 'was' anchor alongside the offer price as the 'now' figure. This preserves the Was/Now price architecture while being technically different from a percentage discount configuration.
Omnichannel
operations
A retail operating model in which the customer experience is designed to be continuous, consistent, and mutually reinforcing across all sales and service channels - physical stores, website, mobile app, self-checkout, and click-and-collect - rather than treating each channel as an independent operation. In everyday language 'omnichannel' is sometimes used loosely to mean 'selling through multiple channels'; in a retail operations context it specifically means that the channels are integrated so that inventory, pricing, promotions, loyalty, and customer identity are consistent regardless of which channel the customer uses.
Used in: Omnichannel Promotions Consistency
P
PAR - Pseudonymous Analytics at the Register (PAR)
platform
An Enactor capability (PRD006, in development) that assigns a probabilistic pseudonymous identifier to anonymous payment transactions at POS, enabling cohort-level segmentation analytics for customers who have not enrolled in the loyalty programme, without capturing personally identifiable information. PAR operates within the ICO's legitimate interests framework for pseudonymous data processing, allowing retailers to analyse and segment the proportion of transactions completed by unidentified customers.
Pass Management Platform
platform
A third-party software service that creates, hosts, updates, and manages wallet passes on behalf of a retailer, handling the technical relationship with both Apple and Google. It holds the Apple and Google certificates, provides APIs for issuing and updating passes, manages push notification delivery via APNs and FCM, and typically includes a portal for pass design, analytics, and campaign management. Examples include PassKit, Passcreator, and Addtowallet.
Used in: Nfc Wallet Passes
Payment and VAS Mode
hardware
An operating mode on a VAS-certified payment terminal in which the terminal reads both a payment card and an Apple Wallet loyalty pass in the same contactless tap. VAS-certified terminals can operate in three modes: Payment Only, VAS Only (loyalty pass reading without payment), and Payment and VAS. The POS software must be configured to handle all applicable modes - this is a software capability requirement, not just a hardware requirement. In Payment and VAS mode, the terminal first requests the loyalty pass data via VAS, then processes the payment in the same NFC field activation.
Used in: Nfc Wallet Passes
Points Rate
loyalty
In Enactor's Loyalty Scheme configuration, the earn rate expressed as the amount of spend (in pence) required to earn one loyalty point. For example, a Points Rate of 100 means the customer earns 1 point for every £1.00 spent. A lower number means a more generous earn rate. This is a specific Enactor configuration field name and differs from the everyday meaning of 'rate', which typically implies a percentage. It is also distinct from Redeem Points Rate, which governs how many points are needed to contribute one penny of redemption value.
Used in: Loyalty Promotions Integration
Price Architecture
merchandising
The deliberate structuring of price points within a category to serve different customer needs and commercial objectives simultaneously - entry price points for value-sensitive customers, good/better/best tiers for trade-up, and premium or private label positions at the extremes. In everyday language 'architecture' implies physical structure; in retail pricing it is a specific strategic framework for the spacing and positioning of price points across an assortment. Well-designed price architecture creates margin recovery opportunity at the upper tiers while protecting price image and market share at the competitive tiers.
Price Elasticity
merchandising
A measure of how sensitive customer demand is to changes in price, expressed as the percentage change in quantity demanded divided by the percentage change in price. A product is elastic if a price increase causes a proportional or larger reduction in volume; inelastic if volume is relatively unchanged by price changes. Critically, the same product can exhibit different elasticity at different price points - a product inelastic at regular retail prices may become highly elastic when promoted, requiring separate elasticity calculations for base price and promotional scenarios.
Price Image Driver
merchandising
A product that disproportionately influences a specific retailer's price image with its particular customer base - distinct from broadly-defined Known Value Items, which tend to be similar across all retailers in a market. Price Image Drivers are identified through primary research into a retailer's own customers' price awareness, rather than industry category benchmarks. Engage3's research found that Price Image Driver-focused pricing investment generated 6.4% market share growth and 4.4% topline growth while spending 66% less than traditional KVI-focused investment.
Price Ladder
merchandising
The practical implementation of price architecture within a specific category, showing the sequential price points from entry through to premium, and the rationale for the perceived value step between each rung. In everyday language a 'ladder' implies sequential ascending steps of equal size; in retail merchandising a price ladder has deliberate spacing - wider steps between tiers that carry meaningful quality differentiation, narrower steps within tiers that are functionally similar. An effective price ladder enables customers to find their entry point while creating visible trade-up opportunities that increase average transaction value.
Private Label
merchandising
Products manufactured to a retailer's own specification and sold under the retailer's own brand or a proprietary brand owned by the retailer, rather than a nationally branded manufacturer's product. Private label products provide the retailer with higher gross margin than equivalent branded products at similar or lower retail prices, because the retailer captures a greater portion of the value chain. European food retail private label penetration crossed 38% by 2026, compressing the viable margin band for branded mid-range SKUs. Also referred to as 'own label', 'store brand', or 'own brand' in UK retail.
Promotion Consistency
promotions
The operational standard requiring that a promotional offer - its eligibility, discount value, presentation, and terms - is identical across every channel through which a customer can purchase. In everyday language 'consistency' implies a general quality of uniformity; in retail operations it is a specific, testable standard with five measurable dimensions: price parity, offer eligibility parity, voucher cross-channel validity, loyalty benefit parity across all POS channels, and promotional timing synchronisation. Failure on any dimension creates a discoverable cross-channel discrepancy.
Used in: Omnichannel Promotions Consistency
Promotion Dependency
promotions
A state in which customers have become habituated to promotional pricing to the extent that they will not purchase at full price, effectively requiring the retailer to maintain promotional discounts on core lines indefinitely to sustain volumes. Promotion dependency occurs when the same customers receive repeated discounts without incremental analysis to distinguish behaviour change from subsidy of purchases that would have happened anyway. In everyday language 'dependency' implies chemical or emotional reliance; in this commercial context it is a specific, measurable margin erosion dynamic with well-documented retail case studies.
Promotional Cannibalism
promotions
The effect by which a promotion on one product reduces sales of competing, non-promoted products in the same category - with the result that category total revenue is flat or negative even when the promoted product shows a sales uplift. Also includes the effect where a promotion induces customers who would have purchased at full price to defer to the promotional window, reducing full-price sales without generating incremental volume. In everyday language 'cannibalism' implies destruction; in retail measurement it is a specific, quantifiable distortion that inflates apparent promotional performance at the item level while concealing category-level damage.
Promotional Dependency
promotions
A state in which a product's regular price has been effectively replaced in customers' minds by its promotional price, so that customers will not purchase at the regular price and the promotional price becomes the de facto reference price. Promotional dependency occurs when promotions are too frequent, too deep, or too predictable - customers learn when to wait. It is the mechanism by which excessive promotional activity destroys price architecture: the promotional price anchors customer expectations downward, rendering the regular price commercially unusable. In everyday language 'dependency' implies personal reliance; in pricing strategy it is a structural margin erosion dynamic with quantifiable commercial consequences.
Promotional ROI
promotions
The ratio of revenue or profit generated during a promotional period to the cost of running the promotion. In everyday language ROI implies a net causal return; in retail promotion measurement, 'promotional ROI' is frequently calculated using gross promotional-period revenue rather than causally attributed incremental revenue - making it a systematically inflated metric that does not distinguish promotional effect from baseline behaviour. When promotional ROI figures are cited without specifying the measurement methodology, they should be treated with caution. Contrast with Incremental ROAS (iROAS), which uses only causally measured additional revenue.
Prospect Theory
promotions
A descriptive theory of decision-making under risk, developed by Daniel Kahneman and Amos Tversky (Econometrica, 1979), demonstrating that people evaluate outcomes relative to a reference point rather than in absolute terms, and that losses are felt approximately twice as acutely as equivalent gains. Prospect Theory is the foundational framework for understanding why loss-aversion-based promotional mechanics - limited-time offers, countdown timers, expiry-linked vouchers - generate stronger customer response than equivalent gain-framing mechanics.
Pull-Forward Effect
promotions
The effect by which a promotion induces customers to purchase earlier than they otherwise would have, or to stockpile greater quantities than normal, resulting in a post-promotional trough period in which sales are depressed as customers draw down stock. The pull-forward effect means that promotional-period uplift is partly or wholly offset by post-promotional underperformance, making the true incremental value substantially lower than in-period measurement suggests. Measurement windows must extend to include four to six weeks of post-promotional trading for FMCG categories to capture this effect.
R
Reciprocity (Promotional)
promotions
In a promotional design context, the principle that a customer who receives an unrequested benefit from a retailer - a free gift, bonus loyalty points, an unexpected discount - feels a psychological obligation to return value, typically through purchase completion or increased spend. Identified as one of six universal principles of persuasion by Cialdini (1984). In everyday language reciprocity simply means mutual exchange; in promotional design it is a specific mechanism exploited by gift-with-purchase mechanics, loyalty bonus events, and samples to drive basket completion.
Redemption Rate
loyalty
In loyalty programme economics, the proportion of issued reward value - points, vouchers, or credits - that customers actually redeem. Expressed as a percentage of issued value. Industry benchmarks typically place this between 14% and 30%. A high redemption rate indicates an engaging programme; too high may create unexpectedly large reward liability. Redemption rate in loyalty is distinct from its use in payments, where it refers to the rate at which payment tokens or instruments are presented for settlement.
Used in: Loyalty Promotions Integration
Reference Pricing
promotions
The commercial practice of displaying a higher 'was' or RRP price alongside a promotional price to establish a favourable price comparison. Regulated in the UK by CMA guidance (August 2024) which requires that a valid reference price must have been the actual selling price for a sufficient period (generally at least 30 days) with sufficient volume sold (applying a 1:2 ratio - at least one unit at full price for every two at the promotional price). Exploits the anchoring effect; subject to enforcement under the DMCCA 2024.
Reward Liability
loyalty
The financial obligation a retailer carries on its balance sheet representing the value of loyalty points, vouchers, and other rewards that have been issued to customers but not yet redeemed. Reward liability accrues at the point of issuance, not at redemption. It must be recognised in the retailer's accounts as a deferred obligation. The eventual cash cost is reduced by breakage, but programme design should not rely on high breakage as a financial planning assumption.
Used in: Loyalty Promotions Integration
RFM Model (RFM)
loyalty
A customer segmentation framework that scores customers 1-5 on three dimensions derived from their transaction history: Recency (how recently they purchased), Frequency (how often they purchase), and Monetary value (how much they spend). The combined score places customers in operational segments - Champions, Loyal, Potential Loyalists, At-Risk, and others - each requiring a different commercial strategy. RFM is backward-looking, describing past behaviour rather than predicting future intent.
S
Scarcity Heuristic
promotions
A psychological shortcut through which people assign higher value to items that are or appear to be rare or difficult to obtain. In promotional design, the scarcity heuristic is activated by low-stock alerts, limited editions, and member-exclusive offers that restrict access to a subset of customers. Research by Verhallen and Robben (1994) established that perceived scarcity reliably increases stated willingness to pay. DMCCA 2024 requires that scarcity claims be substantiated - fabricated low-stock alerts are an unlawful commercial practice.
Seasonal Baseline
promotions
A modelled estimate of what sales would have been during a promotional period without the promotion, accounting for the normal seasonal variation in demand. The seasonal baseline is the counterfactual against which promotional uplift is measured - without it, seasonally elevated sales are incorrectly attributed to the promotion. For most UK retailers, the practical approach is an equivalent calendar-week comparison using two to three years of historical data, adjusted for known trading differences. More sophisticated synthetic control methods construct a weighted historical combination to minimise pre-period variance.
Second Visit Rate
promotions
The proportion of customers who make a first purchase through or during a promotion and who then make a second purchase within a defined follow-on window - typically 30, 60, or 90 days. Second visit rate is a Tier 1 commercial outcome metric for promotions designed to acquire new customers or reactivate lapsed ones. In Enactor's Promotion Intelligence Framework, second visit rate for acquired customers is tracked as EFF-005. A low second visit rate on an acquisition promotion indicates the customers acquired are not converting to loyal shoppers.
Segmentation-to-Execution Gap
loyalty
The operational disconnect between a retailer's customer segment model and the POS systems that need to apply segment-specific promotional mechanics at the moment of transaction. For segmentation to generate commercial return, four conditions must be simultaneously true: the customer must be identified at POS; their segment membership must be current in the POS system; the promotion must be configured to activate based on that membership; and the offer must be appropriate for that segment. Most UK retailers fail on at least two of these four conditions. In everyday language 'gap' suggests a simple shortfall; in this context it is a specific, measurable operational failure mode.
Serialised Voucher
promotions
A voucher with a unique serial number that allows it to be individually tracked from issuance through to redemption. Serialisation enables single-use enforcement (a voucher can be marked as redeemed so it cannot be used again), customer linkage (the voucher is associated with a specific customer record), and full audit trail. In Enactor, serialised vouchers are configured through Voucher Type Maintenance with Track enabled, a generated serial number, a Usage Limit of 1, and Update Usage activated. Serialised vouchers are the mechanism for one-to-one targeted promotional voucher issuance.
Used in: Loyalty Promotions Integration
Single Source of Truth (SSOT)
operations
An architectural principle in which a single system is designated as the authoritative record for a given data entity - such as promotion configurations, inventory levels, or pricing - and all other systems derive their data from that source rather than maintaining independent copies. In everyday language 'source of truth' is used colloquially to mean any reliable reference; in retail architecture it is a specific system design decision that determines whether cross-channel consistency is achievable or merely aspirational. For Enactor retailers, Estate Manager is the single source of truth for promotion configuration.
Used in: Omnichannel Promotions Consistency
Soft Opt-In
loyalty
A provision in the UK Privacy and Electronic Communications Regulations (PECR) that permits a business to send electronic marketing communications to an existing customer without their explicit prior consent, subject to conditions. The customer must have provided their contact details in the context of a sale of a similar product or service, must be given a clear opportunity to opt out at sign-up and in every subsequent message, and the communication must relate to the same or similar products and services. For loyalty programmes, this permits sending transactional communications - such as points balance updates and reward confirmations - to enrolled members without requiring fresh marketing consent for each message.
Used in: Loyalty Promotions Integration
Spend Threshold
promotions
In a retail promotional context, a minimum transaction value that a customer must reach to unlock a promotional benefit - such as a percentage discount, a free gift, or bonus loyalty points. In everyday language 'threshold' suggests a passive boundary; in this context it is an active promotional mechanic designed to increase average basket value by creating a spend target for the customer. Configurable in Enactor with a maximum reward saving to cap liability on high-spend events.
T
Tier Promotion Strategy
loyalty
A configuration setting in Enactor's Loyalty Scheme Maintenance that determines how customers advance between loyalty tiers. Four options are available: Manual (the retailer manages tier status directly), Points Balance (automatic advancement when the customer reaches a configured points threshold), Annual Spend (advancement based on cumulative spend within a rolling year period), and Custom (built using the Enactor toolset for complex multi-criteria logic). The strategy determines whether tier advancement is retailer-controlled, automatically calculated at transaction time, or driven by a bespoke rule.
Used in: Loyalty Promotions Integration
U
Unified Commerce
operations
An evolution of omnichannel retail in which sales, fulfilment, and service processes are built natively on a single integrated platform with a shared data layer, rather than integrating separate best-of-breed channel systems. Unified commerce means the same inventory, pricing, promotions, loyalty, and customer identity data is available in real time to every channel without synchronisation latency. Manhattan Associates' 2025 Unified Commerce Benchmark found only 17% of retailers rate their unified commerce capabilities as mature.
Used in: Omnichannel Promotions Consistency
V
Value-Based Pricing
merchandising
A pricing strategy in which the price is set based on the perceived value to the customer rather than on production cost or competitive benchmarks. Value-based pricing is appropriate for unique, branded, experiential, or differentiated products where the customer's willingness to pay is determined by their perception of the benefit rather than by comparison with alternatives. In retail, value-based pricing typically applies to premium tiers, private label at the quality end, and service-based components of the retail offer. It is the highest-margin position in the price architecture.
VAS-Certified Terminal
hardware
A payment terminal approved by Apple to support the VAS protocol, enabling it to read Apple Wallet loyalty passes via NFC alongside a payment transaction. VAS certification is granted by Apple via the WPC Reader Programme to specific terminal models. A terminal that accepts Apple Pay contactless payments is not automatically VAS-certified - these are separate certifications. Dedicated loyalty-only NFC readers are an alternative for environments where payment terminal replacement is impractical.
Used in: Nfc Wallet Passes
W
Wallet Pass
loyalty
A digital card stored in Apple Wallet or Google Wallet representing a loyalty card, membership, coupon, event ticket, or similar credential. A wallet pass is a structured data object - containing fields such as customer name, points balance, tier, barcode, and expiry date - that is stored in a mobile wallet application and can be displayed, updated remotely, and (if NFC-enabled) read at a contactless terminal. Passes are issued by a pass management platform using certificates from Apple or Google and can be updated at any time by the issuer without customer action.
Used in: Nfc Wallet Passes
Win-Back Campaign
loyalty
A targeted promotional programme designed to reactivate customers who have lapsed - specifically those whose purchase recency has fallen below a defined threshold, typically placed in the At-Risk or Lapsed RFM segments. Win-back campaigns use loss-aversion framing and genuine urgency to maximise response rate. In everyday marketing language, 'campaign' often implies a broadcast communication; in this context a win-back campaign is typically a personalised, group-targeted mechanic - a serialised voucher or group-scoped promotion - configured at POS level and triggered by the customer's segment membership at the moment of transaction.
Social Proof