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Criterion
Paper illustration of an assumption matrix with prioritized test cards
Decision Making
Assumption Surfacing
Paper illustration for Incident Timeline Analysis.
DevOps
Incident Timeline Analysis
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.For an incident with an unclear sequence, the method makes the timeline precisely visible. It separates perception, reaction, and delay so cause and effect become more clearly readable.
Complexitydifferent
LowMedium
Timedifferent
45-90 min60-180 min
Participantsdifferent
2-83-10
Formatsame
Workshop + asyncWorkshop + async
Outputdifferent
Assumption List, Critical Assumptions, Learning PlanIncident Timeline, Evidence Log, Delay Analysis, Improvement Actions
Tagsno overlap
AssumptionsRiskDecisionDiscovery
IncidentTimelineSite Reliability Engineering
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Often compared together

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
Blameless Postmortem workspace showing the question, observations, and next decision.
DevOps
Blameless Postmortem
Paper illustration for Causal Factor Analysis.
Operations
Causal Factor Analysis
Paper illustration of DIBB with its method-specific working model.
Product Strategy
DIBB