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🧪 Day 4

Prototyping to Look for First Signals

Nov 26, 2026

Today you will design the simplest test that shows real customer interest.

Reading from Imaguru

Basics of prototyping and a basic metric/event-tracking plan; from qualitative evidence to prioritised requirements, metrics and acceptance criteria.

What the experts cover

  • Marcin (10 min): What first signal suggests customer interest; the simplest test that shows it (e.g. fake-door test); what user flow the test needs.
  • Andrew (10 min): The power of metrics and hypothesis tests; what success means for the product and the project.
  • Vitalijs (10 min): Converting qualitative evidence into formal, prioritised functional requirements, metrics and acceptance criteria; tool overview.

Tools & templates

  • Examples of tests (fake door)
  • User-flow / specification template
  • Lovable, Codex, Claude prototype-tool overview
  • AxWise