A practical measurement plan starts with decisions: which acquisition channel to fund, where onboarding loses users, or which feature supports retention. Each question maps to a KPI, then to clearly defined events and properties.
Definitions prevent drift
Include trigger conditions, platforms, ownership, permitted values and examples. Naming rules matter, but shared meaning matters more. Distinguish an attempted checkout from a completed payment and document how refunds affect revenue reporting.
Review the plan with product, engineering, marketing and data teams before implementation. That conversation is often where hidden assumptions emerge.
Turn uncertainty into a testable question
If your team is seeing these issues, document the affected journey, platform, app version, expected behaviour and report. This creates a useful starting point for an implementation review.