Created by: Aleksandr Konstantinov @integralevolution October 1, 2025

Contents

1. How to Use the Playbook
2. Lean Product Discovery Method
3. PMF Hypothesis Formula
4. Step by Step Guide to PMF
5. Key Mistakes to Avoid
6. Bonus: Competitive Analysis with AI

Tips on Optimal Use of This Playbook

Each step of the playbook is promptable, and we do recommend you leverage AI for this playbook. To do that:

1. At the start, brief AI about what you are doing. Record a voicenote where you share whatever seems important to share in the moment, like you would to a colleague when briefing them.
2. Upload this playbook at the start of your conversation thread for AI to be primed about lean venture-building (which leads to a deeper and root-cause thinking and more practical & solid answers from AI).
3. Use iterative improvement with AI to simplify and refine.
4. To do that, you can use these two short prompts: 1. “Please roast this result, no mercy.” —> then “Please produce the next version.”. Then repeat until AI starts to oversimplify or distort instead of just simplify & synthesize. Read and edit each version carefully and feed it back to the AI, otherwise you’ll get a lot of nonsense you need to edit with critical thinking.
5. When unsure of the next step, ask AI: “What question we should ask ourselves to unlock the optimal next step?”

Lean PMF Discovery Method

Absurdly Simple Masterkey to PMF: the faster you test and refine your idea, the quicker you'll find product-market fit.

Real-world validation of the painful situation, and who’s experiencing it is the key optimization goal because it is a key proxy for PMF: a product sells and grows organically when it significantly improves somebody’s painful situation, i.e. delivers a transformational result.

You test and refine your idea by iterating on your PMF hypothesis.