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Criterion
Game Day workspace showing the question, observations, and next decision.
DevOps
Game Day
Paper illustration of an assumption matrix with prioritized test cards
Decision Making
Assumption Surfacing
Purposedifferent
In preparing for rare incidents, the method tests response capability under controlled conditions. It shows where assumptions about stability, roles, and recovery are too optimistic.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
HighLow
Timedifferent
Halber Tag45-90 min
Participantsdifferent
5-202-8
Formatdifferent
WorkshopWorkshop + async
Outputdifferent
Simulation Notes, Gaps List, Updated RunbooksAssumption List, Critical Assumptions, Learning Plan
Tagsno overlap
ResilienceOperationsIncident
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 of DIBB with its method-specific working model.
Product Strategy
DIBB
Paper illustration for Failure Mode and Effects Analysis
Operations
Failure Mode and Effects Analysis
Paper illustration for Failure Scenario Analysis.
Engineering
Failure Scenario Analysis