Conduct systematic root cause analysis to identify underlying problems. Use structured methodologies to prevent recurring issues and drive improvements.
Root cause analysis (RCA) identifies underlying reasons for failures, enabling permanent solutions rather than temporary fixes.
Minimal working example:
Example: Website Down
Symptom: Website returned 503 Service Unavailable
Why 1: Why was website down?
Answer: Database connection pool exhausted
Why 2: Why was connection pool exhausted?
Answer: Queries taking too long, connections not released
Why 3: Why were queries slow?
Answer: Missing index on frequently queried column
Why 4: Why was index missing?
Answer: Performance testing didn't use production-like data volume
Why 5: Why wasn't production-like data used?
Answer: Load testing environment doesn't mirror production
Root Cause: Load testing environment under-provisioned
Solution: Update load testing environment with production-like data
Prevention: Establish environment parity requirements
Detailed implementations in the references/ directory:
| Guide | Contents |
|---|---|
| The 5 Whys Technique | The 5 Whys Technique |
| Systematic RCA Process | Systematic RCA Process |
| RCA Report Template | RCA Report Template |
| Root Cause Analysis Techniques | Root Cause Analysis Techniques |
| Follow-Up & Prevention | Follow-Up & Prevention |