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Criterion
Independent contributions form an ordered group priority list.
Facilitation
Nominal Group Technique
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
When loud voices could dominate a round, Nominal Group Technique protects individual thinking time from group effects. It collects ideas separately first and only then enables shared weighting.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.
Complexitydifferent
MediumLowLow
Timedifferent
60-120 min45-90 min10-20 min
Participantsdifferent
5-122-84-100+
Formatdifferent
WorkshopWorkshop + asyncWorkshop
Outputdifferent
Ranked Ideas, Clarified Options, Group PriorityAssumption List, Critical Assumptions, Learning PlanIdea List, Shared Insights, Emergent Themes
Tagsno overlap
FacilitationPrioritizationVotingInclusion
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 of shared options, independently placed voting dots, and a highlighted shortlist.
Facilitation
Dot Voting
Paper illustration of a calibrated five-by-five risk matrix with response cards.
Decision Making
Risk Matrix
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