Purpose
The method helps clarify customer problems, solution ideas, and evidence concretely. It separates problem, assumption, solution, and evidence. The outcome is captured as an assumption map, test backlog, and risk ranking.
Product Discovery
Assumption Mapping
Turns customer problems, solution ideas, and evidence into a tangible result through collecting assumptions, rating importance, and planning tests.
Which assumptions do we need to validate first because they are both critical to the initiative and uncertain?
MediumWorkshop + async45-60 min
How it works
The team follows the steps: collect assumptions, rate importance, rate uncertainty, map risks, and plan tests. Each step is captured visibly. At the end, an assumption map, test backlog, and risk ranking are available so decisions, tests, or actions can follow directly.
Visual orientation
Method sketch for a quick mental model.
Flow
- 1Collect assumptions
- 2Assess importance
- 3Assess uncertainty
- 4Map risks
- 5Plan tests
The runsheet guides execution with 5 phases, timeboxes, 5 pitfalls, and clear stop criteria.
Open runsheetIdeal for
- Opportunity validation
- Experiment planning
- MVP scoping
Not good for
- Final forecasting
- Very stable products
Deep dive
In detail
Assumption mapping follows a clear working logic: collect assumptions, assess importance, assess uncertainty, map risks, and plan tests. This turns the method into a visible thinking process rather than only a conversation. Participants move step by step from raw material, observations, or options toward a shared structure. The result is an assumption map, test backlog, and risk ranking that makes decisions, learning, or further planning actionable.
Facilitation
Prepare a clear prompt, the right information, and a visible workspace. Plan about 45-60 minutes with 2-8 people and use the format in a workshop or asynchronously. The facilitation needs structure and preparation; short timeboxes, visible intermediate results, and a parking lot for open questions help.
Output artifacts
Assumption mapTest backlogRisk ranking
Artifact templates
Assumption Map ChecklistChecklist for critical assumptions by risk and knowledge level.checklist
Assumption Map ChecklistChecklist for critical assumptions by risk and knowledge level.
checklistassumption-map-checklist.md
Checklist for critical assumptions by risk and knowledge level.
- Formulate assumption as a testable statement
- Assess risk
- Assess level of knowledge
- Add data source or test idea
- Mark riskiest assumption
- Define success criterion
- Set owner and date
When to choose differently
Short decision aid for existing alternatives.
Pre-Mortem
Statt Assumption Mapping, wenn du mit Pre-Mortem Fehlerszenarien im Voraus durchspielen und Risiken früh benennen willst.
Similar methods
All methodsProduct Discovery
Riskiest Assumption Test
Moves customer problem, solution idea, and evidence toward a concrete result through "collect assumptions explicitly", "rate uncertainty and leverage for each assumption", and "decide to pivot, persevere, or stop".
Decision Making
Assumption Surfacing
Clarifies options, criteria, and risks by framing the initiative or decision, collecting implicit assumptions, and planning tests or research.
Product Discovery
MVP Test Matrix
Moves customer problem, solution idea, and evidence toward a concrete result through "list assumptions", "map assumptions to dimensions", and "derive the test plan".
Product Discovery
Dual-Track Agile
Verbindet kontinuierliche Product Discovery mit laufender Delivery, damit Teams lernen und liefern, ohne beides zu vermischen.
Product Discovery
Experiment Canvas
Moves customer problem, solution idea, and evidence toward a concrete result through "clarify the learning goal and the assumption to test", "formulate the hypothesis as an if-then statement", and "define the decision rule after the test".
Product Discovery
Working Backwards
A future press release and FAQ force customer value, launch story, objections, and evidence into one reviewable artifact.