QUALITY MANAGEMENT

Fishbone Analysis - Motor Vibration

New CAPA
ROOT CAUSE ANALYSIS

Fishbone Analysis - Motor Vibration

Excessive vibration detected during final motor testing
CAPA-2026-0013 · Excessive vibration in finished motor
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Interactive Ishikawa Diagram
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Cause Root cause
CAUSES Man Assembly balancing check was n… Machine Balancing machine calibration … ✓ Method Rotor balancing tolerance was … ✓ Material Rotor material density variati… Measurement Vibration sensor verification … Environment Test bench mounting was not is… PROBLEM Excessive vibration detecte… during final motor testing
Cause Register
Evidence-backed causes identified during analysis
6 causes
CategoryCauseEvidenceClassification
Man Assembly balancing check was not consistently documented Additional sample evidence for CAPA-2026-0013. Potential cause
Machine Balancing machine calibration drift Additional sample evidence for CAPA-2026-0013. Root cause
Method Rotor balancing tolerance was outdated Additional sample evidence for CAPA-2026-0013. Root cause
Material Rotor material density variation Additional sample evidence for CAPA-2026-0013. Potential cause
Measurement Vibration sensor verification interval was too long Additional sample evidence for CAPA-2026-0013. Potential cause
Environment Test bench mounting was not isolated from floor vibration Additional sample evidence for CAPA-2026-0013. Potential cause
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