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Criterion
Paper illustration of an assumption matrix with prioritized test cards
Decision Making
Assumption Surfacing
Paper illustration for 1-2-4-All.
Facilitation
1-2-4-All
Purposedifferent
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.When many people in a group too rarely get to speak, 1-2-4-All distributes thinking time more fairly. The format builds participation step by step and makes quiet or still-unformed thoughts usable faster.
Complexitysame
LowLow
Timedifferent
45-90 min10-20 min
Participantsdifferent
2-84-100+
Formatdifferent
Workshop + asyncWorkshop
Outputdifferent
Assumption List, Critical Assumptions, Learning PlanIdea List, Shared Insights, Emergent Themes
Tagsno overlap
AssumptionsRiskDecisionDiscovery
FacilitationInclusionIdeation
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Often compared together

Methods with strong topical overlap with the current selection, not yet in the comparison.

Paper illustration for Round Robin Brainstorming
Innovation
Round Robin Brainstorming
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 the Lightning Decision Jam working structure.
Facilitation
Decision Jam
Paper illustration of DIBB with its method-specific working model.
Product Strategy
DIBB