Four‑Fit Validator

Use this form to assess your project against the Four‑Fit gates. No data is stored.

Checklists and stop rules

• Problem Market Fit
  • Evidence of active solution seeking and willingness to pay
  • Stop if not observed in field
• Behavior Market Fit
  • Identity Fit ≥ 6/10, Capability Fit ≥ 6/10, Context Fit ≥ 6/10
  • Stop if limiting factor < 6/10
• Solution Market Fit
  • TTFB < 5 minutes (B2C) or < 1 day (B2B pilot); clear completion by D7
  • Stop if the median user requires training to complete
• Product Market Fit
  • Behavior retention at D30 and D180; organic spread explained by behavior visibility/network value
  • Stop if retention not met; return to prior fit

Links: Δ‑B, TTFB, CRS (Chain Risk Score)

Heuristics only. Calibrate thresholds by domain and link your claims to the Evidence Ledger.