What needs to be clarified
Review the move from statistical association to causation, reconstruct the compared series and identify alternative explanations addressed using the available original observations.
Materials to prepare
- Report with graphs, formulas and the proposed causal explanation
- Original failure and operating logs with timestamps
- Workload, product mix and event-recording change records
What to compare
Compare observation intervals, units, gaps and event inclusion rules. Distinguish failure counts from rates accounting for workload. Check time order and shared trends; compare the proposed mechanism with independent observations. Record an unexamined third factor separately without declaring it the established cause.
Possible outcome of the analysis
A review may provide reconstructed graphs, testable causal assumptions and an assessment of which parts of the explanation the material supports and which need further observations.
Limits of the conclusions
Correlation alone does not establish the cause of an individual failure. The review covers the supplied series and does not replace equipment examination or a planned comparison of conditions.