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.
Diagnostic module
Report doctrine
This explanation layer clarifies the report semantics for search engines and AI systems without changing any report logic or stage output.
Purpose
One system view
The Product Fit Report exists to consolidate evidence quality, risk exposure, and next actions from the three ProductBooks stages into one operational artifact.
Inputs
Stage outputs remain authoritative
Problem-Solution Fit, Product-Market Fit, and Business Model Fit provide the inputs. The report does not repair weak evidence or infer confidence that is not present.
Outputs
Decision-ready synthesis
The report is designed to show what holds, what fails, and what proof is still missing before scale, budget, or governance decisions are made.
Diagnostic module
What the report needs
The report reflects stage outputs exactly. It does not reinterpret weak evidence.
Problem layer
Problem
System state
Current layer
Evidence quality
In review
Risk weighting
Moderate
Operational recommendation
Problem evidence and gaps from Problem–Solution Fit.
Next action
Include this when the problem stage has already been scored.
Product layer
Product
System state
Current layer
Evidence quality
In review
Risk weighting
Moderate
Operational recommendation
Demand, retention, and payment signals from Product–Market Fit.
Next action
Include this when live usage and repeat behaviour have been tested.
Diagnostic layer
Model
System state
Current layer
Evidence quality
In review
Risk weighting
Moderate
Operational recommendation
Economic durability, cost structure, and founder dependency from Business Model Fit.
Next action
Include this when scale or spend decisions are approaching.
Diagnostic module
What the report outputs
One document. One system view. No optimism layer.
Diagnostic layer
Executive Summary
System state
Current layer
Evidence quality
In review
Risk weighting
Moderate
Operational recommendation
A single verdict across the full ProductBooks system.
Next action
Use this for boards, investors, and decision reviews.
Diagnostic layer
Evidence Gaps
System state
Current layer
Evidence quality
In review
Risk weighting
Moderate
Operational recommendation
A stage-by-stage list of what still fails, blocks, or remains missing.
Next action
Use this when the next action needs to be obvious and prioritised.
Diagnostic module
System references
The report sits downstream of the stage order and upstream of advisory or governance decisions.
Diagnostic module
Command path
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 FitPrimary action
Generate the report once the stage verdicts are ready.
Use the report to show what holds, what fails, and what still needs proof.