Defect Root Cause Analysis
Investigating the 'why' behind quality issues to drive corrective action.
Mean Time to Detect (MTTD)
4 hrs
Avg. time to find defect cause
Mean Time to Resolve (MTTR)
8 hrs
Avg. time to implement fix
Repeat Defect Rate
12%
Defects recurring post-fix
Production Impact
1,500 units lost
Lost volume due to defects
Pareto Analysis of Defect Types
Defect Frequency by Category
Identifying the "vital few" defects that cause the majority of problems (80/20 rule).
Root Cause Investigation
Fishbone (Ishikawa) Diagram
A visual tool for brainstorming potential causes of a problem.
Problem: High Defect Rate
Manpower
Method
Machine
Material
Measurement
Defects by Machine
Root Cause Distribution