Fault management turns individual events into traceable maintenance decisions. Separate the reported symptom, confirmed cause, corrective work and verification rather than recording every event as a generic machine failure.
Use a Consistent Event Record
- Machine and cell identification, controller and configuration where relevant.
- Event time, operating state, alarms and the last known acceptable conditions.
- Material, mold, auxiliaries, part findings and relevant recent changes.
- Immediate authorized response and the responsible personnel.
- Inspection evidence, confirmed or unresolved cause, work performed and parts changed.
- Verification results, remaining actions and return-to-service authorization.
Set Priorities from the Actual Site
Assess consequences for people, equipment, quality and production using the site’s assigned process. Do not apply unexplained A/B/C machine categories as if they were a universal maintenance standard. An abnormal condition requiring a stop must not simply wait for a convenient production break.
Review Repeated Events on a Comparable Basis
Use consistent event and downtime definitions. Record the observation period and operating hours where available before comparing counts or calculating reliability measures. Separate repeat symptoms from confirmed repeat causes, and distinguish planned work from unplanned interruptions.
A lower event count alone does not prove a reliability improvement if operating time, reporting practice or production demand has changed.
Turn Findings into Preventive Work
Assign actions, owners, due dates and evidence required for closure. Use the machine instructions, service findings and actual condition to review inspections, training, spare-parts planning or approved engineering changes. Keep any revised interval or procedure documented.
Close the Loop after Repair
Verify the relevant functions and part requirements under the applicable return-to-service procedure. Preserve the record even when the cause remains unresolved; do not convert a suspected explanation into a confirmed diagnosis.
Management Questions
Does Every Alarm Represent a Failed Component?
No. Record the actual event and evidence; alarms, process deviations and component failures should not be treated as identical categories.
Can One Maintenance Interval Apply to Every Machine?
No. Use the actual documents, duty, condition and site responsibilities.
See maintenance roles and the technical-support evidence checklist.
