Root Cause
Trace symptoms back to their underlying causes.
Root Cause
5 Whys
Ask why five times
Root Cause
Fishbone Diagram
Causes grouped under 6 Ms
Root Cause
Fault Tree
AND/OR logic of failure paths
Root Cause
A3 Problem Solving
One-page Toyota problem report
Root Cause
DMAIC
Define, Measure, Analyze, Improve, Control
Root Cause
PDCA Cycle
Plan, Do, Check, Act
Root Cause
Current Reality Tree
Logical tree of undesirable effects