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Build60 minutesUnit 5 of 8 · Lesson 3 of 4

Instrument for questions, not for completeness

A still from the film for Instrument for questions, not for completeness
The verification fix ships tomorrow. On day one, someone will ask: did it work? Launch day is the worst time to find out you cannot answer.

Write the question first, then the event

  1. 01
    Write the questions first

    Write the questions first

    Did anyone use it? Who? Did they come back? Did it break? Did it move our number? These come up in week one almost every time.

  2. 02
    Then add only what answers them

    Then add only what answers them

    Each question needs one or two events, with the properties you will want to split by, like platform or bank.

  3. 03
    No question, no event

    No question, no event

    If an event does not answer a question, delete it, however cheap it seems to add.

  4. 04
    Tracking everything is noise

    Tracking everything is noise

    Every extra event costs money to store and time to wade through. A short plan gets read. A long one gets ignored.

Doing it with AI, and where it breaks

The move

Generate an event plan from your spec, then delete every event you cannot attach to a question.

The trap

It produces an exhaustive list of every click and hover. That is noise you pay to store and never query.

Prompt worth stealing

Here are the five questions we must answer in week one, and the feature spec. Propose the smallest set of events that answers them. For each event give: name, when it fires, properties, and which question it answers. Include nothing that answers no question.

Build it

The artefact

A tracking plan where every event is tied to a written question.

Plausible, PostHog or GA4

0/4

The worked solution

Stuck, or want to compare?

There is a worked solution. Try the build first. Reading it before you have attempted anything is the fastest way to learn nothing.

Checkpoint

If you did the build, these take two minutes. If you cannot answer one of them, that is the part to go back to.

Moving on marks this lesson complete. Finish the build first, it is the part that counts.

Previous lessonRetention reveals repeated value