Quick scan: the simplest action

• Diagnostic question

  Weekly sign-ups or orders

  traffic volume question

  Sizes the traffic at the step that matters, which decides whether a standard A/B test can read in time or small-sample designs apply.

• Diagnostic question

  The key action at each stage

  desired actions question

  Names the one action wanted from users at each lifecycle stage, so every lens rates the right behavior.

• Diagnostic question

  Can you log test assignment?

  experiment logging check

  Checks whether assignment and exposure to test variants can be logged for trustworthy readouts.

• Diagnostic question

  When permission is asked

  permission timing question

  Checks whether email, push or install permission is asked before or right after the first value.

• Diagnostic question

  Gaps in the trigger cascade

  trigger cascade question

  Maps every message by day and purpose to find gaps and a missing recovery path after a lapse.

• Diagnostic question

  Who receives the reminders

  trigger audience question

  Checks whether reminders reach the people whose responses are the reward, not only the person who set things up.

Sources

• Hooked · Nir Eyal

  Ch.6 · Ch.8

Book content is paraphrased, never quoted at length. Last verified October 24, 2026.