Classify each belief
Desirability covers customer behaviour, feasibility covers delivery, and viability covers sustainable economics or operations.
Free MVP risk tool
Assumption Mapper
Rank desirability, feasibility and viability assumptions by importance and evidence to identify the riskiest belief to test first.
- Uses your inputs in a transparent calculation
- Instant result with practical next steps
- No signup required
Planning guidance only. Validate important decisions with customer evidence and your delivery team.
YOUR INPUTS
Build your result
Complete every field. The result updates only when you choose Calculate.
How it works
Rate importance and evidence
Score each assumption 1–5 on how critical it is and how much evidence already supports it.
Get a ranked test backlog
Risk equals importance multiplied by the inverse of evidence — the highest-risk assumptions become the priority order to test.
Continue learning:
Frequently asked questions
What is an MVP assumption?
It is a belief that must be true for the product or business model to work but is not yet fully supported by evidence.
How is risk calculated?
Importance from 1–5 is multiplied by 6 minus evidence from 1–5, then multiplied by four to produce a 4–100 score.
Is a high-risk assumption bad?
Not necessarily. It means the assumption is important and weakly evidenced, so learning about it has high value.
What test should come next?
Choose the fastest ethical test that can materially strengthen or weaken the top assumption — such as interviews, a landing-page behaviour test, paid pilot or technical spike.
How We Compare
| Feature | MVPHub | Miro | Mural |
|---|---|---|---|
| Desirability, feasibility and viability types | Included | Included | Limited |
| Transparent numerical risk score | Included | Not included | Not included |
| Collaborative 2×2 mapping | Not included | Included | Included |
| Instant ranked test backlog | Included | Limited | Limited |
MVPHub calculates and ranks individual assumptions from structured inputs. Miro and Mural provide collaborative visual assumption-mapping templates based on importance and certainty.
Related tools
Embed this tool
Add this tool to your site with the canonical iframe below. It remains hosted and maintained by MVPHub.