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Criterion
Paper illustration for Behavior Over Time Graph.
Systems Thinking
Behavior Over Time Graph
Paper illustration of an assumption matrix with prioritized test cards
Decision Making
Assumption Surfacing
Design sheets and interface cards connect to jointly written pseudocode with highlighted unresolved questions.
Architecture
ARID (Active Reviews for Intermediate Designs)
Purposedifferent
A Behavior Over Time Graph shows how a metric or observation develops over time. The method makes trends, breaks, and recurring patterns visible that get lost in snapshots.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.ARID examines how well developers can work with a technical design. It focuses on a part of the system that can still be revised, between the architecture overview and the detailed specification.
Complexitydifferent
LowLowMedium
Timedifferent
20-45 min45-90 min2–4 h review as a planning range; preparation and evaluation additional
Participantsdifferent
1-102-8Designers, developers as users, and facilitation
Formatsame
Workshop + asyncWorkshop + asyncWorkshop + async
Outputdifferent
Behavior Over Time Graph, Trend Hypotheses, Key EventsAssumption List, Critical Assumptions, Learning PlanPrioritized development tasks, Jointly produced code or pseudocode, Observed difficulties and open design questions, Proposed design revisions
Tagsno overlap
Systems thinkingPatternsDynamics
AssumptionsRiskDecisionDiscovery
ArchitectureEngineeringFeedbackValidationTasks
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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
Causal Loop Diagram workspace showing the question, observations, and next decision.
Systems Thinking
Causal Loop Diagram
Paper illustration for Risk Storming.
Architecture
Risk Storming
Paper illustration of Riskiest Assumption Test with a method-specific labelled workspace.
Product Discovery
Riskiest Assumption Test