The Problem-Solution Fit framework

Problem-Solution Fit is the first major milestone: evidence that your solution effectively addresses a real, painful problem for real people.

Overview

Problem-Solution Fit (PSF) is the stage before Product-Market Fit. It's the evidence that:

  • You've correctly identified a real, painful problem
  • Your proposed solution addresses that problem in a way customers value
  • The people experiencing this problem are willing to engage with (and ideally pay for) your solution

Think of it as a precondition for PMF — you can't achieve PMF if you haven't first achieved PSF.

How PSF Differs from PMF

| Problem-Solution Fit | Product-Market Fit | |---|---| | You have a solution concept | You have a working product | | Proven with interviews and prototypes | Proven with retention and revenue data | | Pre-product stage | Post-launch stage | | Small number of target customers | Growing customer base |

The Three Tests

Test 1: Problem Validation Can you interview 10 people who describe the problem in terms that match your hypothesis — unprompted?

Test 2: Solution Resonance When you describe or prototype your solution, do the people with the problem immediately "get it"? Do they say "I wish this existed" or "I'd use this right away"?

Test 3: Intent Signal Are at least some of those people willing to give you something of value — pre-payment, a letter of intent, a pilot agreement, their time to test a prototype?

Signals of PSF

  • 7+ out of 10 interviewees describe the problem in similar terms
  • 5+ interviewees respond with strong positive interest to the solution concept
  • At least 2–3 are willing to take a concrete action (sign up, pay, commit to a pilot)

Common Pitfalls

  • Confusing politeness with validation ("That sounds great!" is not PSF)
  • Testing with friends who want to support you, not real target customers
  • Skipping PSF and jumping straight to building

Used in Venture OS

PSF is the goal of the Explore and Understand stages in the Venture OS journey. The Validation module helps you systematically gather and track evidence of PSF.