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Selected:Fault Isolation Growth Experiment ARID (Active Reviews for Intermediate Designs)Learning Card

Criterion	Engineering Fault Isolation	Growth Growth Experiment	Architecture ARID (Active Reviews for Intermediate Designs)	Product Discovery Learning Card
Purposedifferent	In technical failures, the visible symptom often gets mixed up with the actual cause. Fault Isolation narrows the fault space and progressively reduces which part of the system is truly affected.	When growth ideas surface quickly, the temptation to build immediately instead of learning is high. A Growth Experiment frames an assumption so target group, lever, and measurement are clear before the first deployment.	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.	The Learning Card connects traceable test results to a reasoned next action while keeping the limits of the insight visible.
Complexitydifferent	Medium	Medium	Medium	Low
Timedifferent	30-180 min	1-2 Wochen	2–4 h review as a planning range; preparation and evaluation additional	25-40 min
Participantsdifferent	1-6	1-6	Designers, developers as users, and facilitation	1-5
Formatsame	Workshop + async	Workshop + async	Workshop + async	Workshop + async
Outputdifferent	Fault Isolation Map, Test Log, Excluded Hypotheses, Narrowed Fault Area	Experiment card, Result summary, Next bet	Prioritized development tasks, Jointly produced code or pseudocode, Observed difficulties and open design questions, Proposed design revisions	Learning Card with evidence and next action
Tagsno overlap	TroubleshootingDiagnosisEngineering	MarketingGrowthExperimentsLearning	ArchitectureEngineeringFeedbackValidationTasks	ExperimentsValidationDiscoveryLearning

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