Learn · Module detail
what to measure first
Measure the events that connect enrolment to value: eligible population, activation, earning, redemption, reversal, and the target behaviour. Start with a small reliable event set before adding dashboards.
## The mechanism
Define the qualifying event, value change, owner, correction path, and member explanation. Keep eligibility, liability, fulfilment, consent, and reversal as separate rules. The operating control must be testable from the ledger.
## Worked example
Illustrative arithmetic: 80 eligible members produce 20 activations and 10 redemptions. Activation is 20 members and redemption is 10 events, so the measures answer different questions.
## Do it
State the rule in one sentence. Map the event that starts it, the event that changes value, the exception path, and the review action. Test ordinary, cancelled, duplicated, and disputed cases before release.
## Common mistakes
- Measuring activity instead of the target behaviour. Name the counterfactual. - Treating face value as operator cost. Price fulfilment and correction. - Hiding exclusions or expiry. Put the boundary beside the decision. - Automating an undefined rule. Resolve ownership before implementation.