How to brief a loyalty platform build without overcomplicating the spec

A loyalty platform brief usually starts lean. One core mechanic, one clear goal. Then the features accumulate: a referral programme, a points system, personalised offers, integrations with three external systems. By the time the spec reaches twenty pages, the budget no longer fits.

At Livewall, we see this pattern regularly. Not because clients lack experience, but because loyalty is a topic that attracts opinions from every direction. Marketing wants gamification. CRM wants data points. The board wants an app. And before a single wireframe is sketched, the scope has doubled.

The fix is not a thinner document. It is a better structure. A brief that separates what the platform needs to do now from what it might do eventually. One that centres behaviour change, not feature lists.

Start with behaviour, not technology

The first question in your brief is not: what features should the platform have? It is: what specific behaviour do you want to encourage or change?

A loyalty programme designed to drive repeat visits requires completely different mechanics than one built to encourage cross-selling. They appear to target the same thing. The underlying architecture is fundamentally different.

Be as concrete as possible. Not 'make customers more loyal', but 'move customers who currently buy twice per quarter to buying three times'. That small distinction determines what incentive you need, what data you must collect, and how the platform feeds information back to the user.

For HEMA Stapelgek, the target behaviour was clear from the start: connect app usage to everyday shopping. That is a fundamentally different brief than 'digitise a stamp card'. That clarity made it possible to build a platform that actually worked.

Three layers in your brief: core, growth, and wishlist

Most bloated specs happen because all requirements sit at the same level. The fix is straightforward: split your requirements into three distinct layers.

Core (must have for launch): What is the minimum platform that makes the target behaviour possible? These are the features you absolutely need for the programme to function. Nothing more.

Growth (second phase): Features that add value once the core is proven. Things you build after you understand how users actually behave. Think additional gamification layers, social mechanics, or deeper personalisation.

Wishlist (maybe someday): Everything that would be nice but has no bearing on the core behaviour. This is where you park the ideas that surface in every meeting but have never been properly thought through.

This sounds simple. In practice, it is a political conversation. Everyone considers their own features 'core'. The product manager who has this conversation honestly ships a platform. Everyone else ships a spec that goes into a drawer.

Our approach to loyalty platform development is always to sharpen these three layers with the client before making a single technical decision.

Define data requirements early

Loyalty platforms collect data. But which data do you actually need to drive the target behaviour?

This sounds like a technical question. It is a briefing question. If you do not know which behaviour you are trying to influence, you do not know which data you need. If you do not know that, you start measuring everything. The result is a privacy and legal headache, longer build cycles, and a system nobody fully understands.

Your brief should explicitly state:

• Which user actions trigger a reward?
• Which external data do you want to connect (POS system, CRM, app usage)?
• What real-time data is required for personalisation?
• What is an acceptable minimum viable data architecture for phase one?

For our work on the Decathlon always-on loyalty programme, the connection to activity tracking data was a core requirement. That needed to be in the brief, not in a technical document two months later. The later you define your data needs, the higher the risk of technical debt that follows you for years.

Loyalty system design always starts with data architecture, not with the interface.

Integrations: the silent scope killer

Nothing drives up the cost and timeline of loyalty platform development faster than vague integration requirements. 'It needs to connect with our CRM' sounds harmless. But if that CRM is twelve years old, uses a bespoke API style, and has documentation nobody understands, that sentence becomes a months-long investigation.

For every integration in your brief, include:

• Which system? (name and version)
• What needs to be synchronised?
• Who is the technical owner on the client side?
• Is existing API documentation available?

Agencies like Livewall can assess technical feasibility much faster with good integration information. Without it, we build in buffer. You pay for that buffer.

A useful rule of thumb: if you cannot describe an integration in two sentences, it is not ready to brief.

Define success before you start

What makes this platform a success twelve months from now? Not in vague terms ('users more engaged'), but in measurable targets.

Your brief should define:

• Which primary KPI determines whether the platform is working? (repeat visit rate, average order value, active members)
• What is the minimum performance that justifies a go-live?
• Which data points do you measure after week one, month one, quarter one?

This definition does two things. First, it keeps scope sharp. If a feature does not contribute to the defined KPI, it belongs on the wishlist. Second, it gives the build team direction. They know what they are optimising for.

For programmes like Proximus+ World, clarity about success KPIs shaped every interface and mechanics decision we made. Without it, we would have made different choices that would have sounded equally logical on paper.

The brief that gets built

A loyalty platform brief does not need to be perfect. It needs to be usable.

That means: a clear behavioural goal, prioritised requirements in three layers, concrete integration information, and measurable success criteria. Anything you cannot place into that structure probably does not belong in the brief yet.

The loyalty platforms Livewall has built that perform best came from briefs with that kind of clarity. Not the thickest documents. The sharpest ones.