Before the session

Read Days 11, 12 and 14 (about five minutes each), or Module 2 on the cheat sheet.

The 30 minutes

  1. 0–5 minOpen

    Quick round: when did you last speak to a customer? A day ago, a week ago, or can't remember.

  2. 5–15 minDiscuss three days
  3. 15–25 minExercise: Map the assumptions

    Take one idea the team is working on. Write every belief it depends on on a sticky note, then place each on a grid of how important it is against how much evidence we have. Circle the one in the important, little-evidence corner.

  4. 25–30 minAction for the week

    Each person has one customer conversation this week, asking about the last time something happened, and brings back one fact they didn't know.

    Agree the team rule: “Talk to customers every week.”

Watch for

Testing the comfortable assumptions first because they feel productive (Day 14). Keep pulling the team back to the one that could kill the idea.

You’ll need

A whiteboard or shared doc with a two-by-two grid, sticky notes and a timer.

Next session: Module 3 · Strategy. Bring one fact from your customer conversation and the circled assumption from today's grid.