Report
Turn stage verdicts into one decision-ready report.
The Fit Report combines problem, product, and model evidence into a single summary.
Use it after at least one stage has been evaluated.
What the report needs
The report reflects stage outputs exactly. It does not reinterpret weak evidence.
Problem
Problem evidence and gaps from Problem–Solution Fit.
When to use
Include this when the problem stage has already been scored.
Product
Demand, retention, and payment signals from Product–Market Fit.
When to use
Include this when live usage and repeat behaviour have been tested.
Model
Economic durability, cost structure, and founder dependency from Business Model Fit.
When to use
Include this when scale or spend decisions are approaching.
What the report outputs
One document. One system view. No optimism layer.
Executive Summary
A single verdict across the full ProductBooks system.
When to use
Use this for boards, investors, and decision reviews.
Evidence Gaps
A stage-by-stage list of what still fails, blocks, or remains missing.
When to use
Use this when the next action needs to be obvious and prioritised.
What to do next
If a stage is still missing, run it before generating the report.
The report is strongest when it includes all three stages in order: Problem, Product, then Business Model.
Start with Problem–Solution FitGenerate the report once the stage verdicts are ready.
Use the report to show what holds, what fails, and what still needs proof.