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Criterion
Paper illustration of Double Diamond with its method-specific working model.
Innovation
Double Diamond
A hypothetical failure makes concrete risks, signals, and fitting mitigations visible.
Decision Making
Pre-Mortem
Paper illustration of an assumption matrix with prioritized test cards
Decision Making
Assumption Surfacing
Purposedifferent
For complex problems with a fuzzy situation, the method cleanly separates search space and decision. It first creates breadth in understanding and then focus in elaboration. This brings open questions, problem definition, and solution path into a traceable movement.In early initiatives with many uncertainties, planning quickly turns too optimistic. A pre-mortem makes the expected failure visible in advance and sharpens the view of causes, gaps, and countermeasures.Plans often contain assumptions that were never openly stated and remain dangerous precisely because of that. Assumption Surfacing makes these silent premises visible and prioritizes which of them carry the initiative or could sink it.
Complexitydifferent
MediumLowLow
Timedifferent
Wochen bis Monate20–45 min45-90 min
Participantsdifferent
3-12Small cross-functional group2-8
Formatdifferent
Workshop + asyncWorkshopWorkshop + async
Outputdifferent
Problem Statement, Solution Options, Prototypes, Deliverables per PhaseRisk list, Mitigation plan, Assumption logAssumption List, Critical Assumptions, Learning Plan
Tagsno overlap
ProcessDivergenceInnovation
RiskDecisionFailurePlanning
AssumptionsRiskDecisionDiscovery
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Methods with strong topical overlap with the current selection, not yet in the comparison.

Paper illustration of a calm four-quadrant Assumption Map with hypothesis cards and emphasis on important assumptions with little evidence.
Product Discovery
Assumption Mapping
Paper illustration for Constraint Analysis.
Decision Making
Constraint Analysis
Paper illustration of DIBB with its method-specific working model.
Product Strategy
DIBB
Paper illustration for Failure Scenario Analysis.
Engineering
Failure Scenario Analysis