Select a case or create a template.
Schema contract
complaintCategory: No-Op | Poor Operation | Unwanted Operation
hypotheses: at least two competing explanations
faultFamily: why the system can fail (Open / Resistance / Short / mechanical / hydraulic / data / geometry…)
causeFamily: what creates the fault (heat / vibration / moisture / aging / contamination / wear / service condition…)
requiredPoints: measurements needed before the conclusion gate
conclusions: exactly one defensible case conclusion
verification: post-repair evidence plan
practical: instructor-observed handoff statement