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Criterion
Paper illustration for 1-2-4-All.
Facilitation
1-2-4-All
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
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.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.
Complexitysame
LowLowLow
Timedifferent
10-20 min20–45 min45-90 min
Participantsdifferent
4-100+Small cross-functional group2-8
Formatdifferent
WorkshopWorkshopWorkshop + async
Outputdifferent
Idea List, Shared Insights, Emergent ThemesRisk list, Mitigation plan, Assumption logAssumption List, Critical Assumptions, Learning Plan
Tagsno overlap
FacilitationInclusionIdeation
RiskDecisionFailurePlanning
AssumptionsRiskDecisionDiscovery
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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 for Constraint Analysis.
Decision Making
Constraint Analysis
Paper illustration of the Lightning Decision Jam working structure.
Facilitation
Decision Jam