Root Cause is the process of identifying the contributing factors for the underlying variations in performance associated with adverse events or close calls.
Physical Cause
System Cause
Prevent problems from recurring
Reduce possible injury/death to the end users
Reduce rework and scrap
Promote happy customers and stockholders
Reduce cost and save money
Pareto Analysis
Brainstorming
Flow Charts or Process Mapping
Cause and Effect Diagram
Benchmarking