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Criterion	Systems Thinking Theory of Constraints Thinking Process	Operations Fishbone Diagram	Systems Thinking Current Reality Tree	Operations Failure Mode and Effects Analysis
Purposedifferent	The Theory of Constraints Thinking Process exposes a system's bottleneck and the logic behind it. It suits situations where many symptoms trace back to the same limiting relationship.	When a problem has several possible contributing factors, the method sorts causes by cause areas. It prevents an initial hunch from blocking the view of other plausible drivers.	A Current Reality Tree condenses many symptoms into a few causal chains. The method makes visible which core problems drive several negative effects at once.	For a process, product, or service with noticeable failure risks, the method assesses possible failure modes in advance. It directs attention to combinations of occurrence, effect, and detectability.
Complexitydifferent	High	Low	High	High
Timedifferent	0.5-3 Tage	30-60 min	2-6 h	2-6 h
Participantsdifferent	4-10	2-8	3-8	3-10
Formatsame	Workshop	Workshop	Workshop	Workshop
Outputdifferent	Current Reality Logic, Conflict Cloud, Future Reality Tree, Implementation Obstacles	Fishbone Diagram, Cause Categories, Investigation Backlog	Current Reality Tree, Core Problems, Intervention Ideas	FMEA Table, Risk Priority, Mitigation Actions
Tagsno overlap	Theory of ConstraintsConstraintsSystems thinkingCausality	Root causeQualityOperations	Systems thinkingRoot causeConstraintsCausality	RiskQualityOperationsRoot cause