Write a minimum measurement plan for one release decision
Define only the outcome, measure, guardrail, and data needed for a named product decision.
- Preparation
- A measurement workshop before instrumentation and release.
- Difficulty
- Advanced
- Task
- Define the release success signal
Before you start
Get what you need before you start
- Bring the release decision, intended outcome, current baseline evidence, known risks, and data governance owner.
- Confirm the lawful basis, access, retention, and deletion requirements before specifying collection.
Steps
Work through the method
Use the listed inputs and tools. Check the evidence when you need to verify a step.
State the later product decision
Write the decision the team will make after release, the intended outcome, affected group, baseline, review window, and guardrail. Mark causal assumptions as assumptions.
Why it matters: The measure should serve a product decision rather than create general tracking.
- Input
- The release brief, intended outcome, baseline evidence, and risk review.
- Output
- A decision statement with outcome, baseline, window, and guardrail.
Tools in this stepAmplitudeEvidence for this step
GOV.UK guidance recommends defining service objectives and required data early, then using performance data to find problems and prioritise improvements.
GOV.UK Service Manual: Measuring from the start; How to use your performance data
Define the minimum observable measure
Choose the smallest event and property set that can inform the decision. Write inclusion, exclusion, identity, quality, privacy, and retention rules before implementation.
Why it matters: A precise definition limits unrelated collection and exposes what the measure cannot show.
- Input
- The decision statement and data governance requirements.
- Output
- A measurement specification with data limits and validation checks.
Tools in this stepAmplitudeEvidence for this step
GOV.UK guidance recommends defining service objectives and required data early, then using performance data to find problems and prioritise improvements.
GOV.UK Service Manual: Measuring from the start; How to use your performance dataAmplitude can define and save a metric from selected events and properties.
Amplitude: Create and configure a new metric
Review and save the metric
Have the product, engineering, and data owners check the event implementation and known gaps. Save the metric and mark inputs Official only after the tracking-plan owner completes the review.
Why it matters: A reusable metric needs a named definition and visible review state, while its remaining limits stay explicit.
- Input
- The implemented events, validation results, and approved specification.
- Output
- A saved metric with owner, review date, known gaps, and decision link.
Tools in this stepAmplitudeEvidence for this step
Amplitude can define and save a metric from selected events and properties.
Amplitude: Create and configure a new metricAn Amplitude tracking-plan owner can mark an event or property as Official so users can filter for endorsed inputs.
Amplitude: How official designations work; Mark an event or property as official
Success checks
Check the result before you finish
- The metric links to one named decision.
- The specification records data quality, privacy, retention, and access limits.
- The team can explain what the measure cannot prove.
Failure modes
Watch for these problems
- Do not release tracking before governance review.
- Stop when the event implementation cannot support the definition.
- Use qualitative follow-up when a metric cannot explain the observed behaviour.
Tools
Choose the tools you need
Tool
Amplitude
A product analytics workspace for saving a defined metric and reviewing recorded feature use.
Check fit, limits and pricingSources
Read the sources behind this practice
Check what each source supports and where the advice has limits.
- GOV.UK Service Manual: Using performance data to improve your service: an introductionPublic-service method guidance · Publication date unavailable
- Hacker News: Are analytics good?First-hand practitioner discussion · Published 22 November 2023
- Amplitude: Create a metric in Data TablesOfficial product documentation · Publication date unavailable
- Amplitude: Official events and propertiesOfficial product documentation · Publication date unavailable