A Pareto analysis of downtime causes (as identified by repair technicians) revealed something that is puzzling to the plant engineer. The following three causes, when added up, comprise about 90% of failures:
- Loose connections in control cabinet.
- Motor insulation failure.
- Wiring problems.
The third one is a broad category, so the plant engineer spoke with a few technicians who selected this cause on their repair report sheet. They said the ma