Root Cause Analysis Template: RCA Methodology
A practical root cause analysis (RCA) template for investigating equipment failures. Covers the 5 Whys, fishbone diagram, and fault tree analysis methods — with a step-by-step template you can adapt.
What is Root Cause Analysis?
Root Cause Analysis (RCA) is a systematic method for identifying the underlying cause of a failure or problem. The goal is not just to fix the symptom, but to eliminate the root cause so the failure doesn't recur. RCA is essential for reducing repeat failures and improving equipment reliability.
RCA Template
1. Problem Definition
Incident title: _________________________________________________
Date/time of incident: ___________________________________________
Equipment ID: __________________________________________________
Reported by: ___________________________________________________
Description of what happened: ___________________________________
Impact (downtime, cost, safety): ________________________________
2. Timeline Reconstruction
What was happening before the failure? __________________________
What was the first sign of a problem? ____________________________
What actions were taken? _______________________________________
What happened after? _________________________________________
3. 5 Whys Analysis
Why 1: Why did the failure occur? _______________________________
Why 2: Why did that happen? ____________________________________
Why 3: Why did that happen? ____________________________________
Why 4: Why did that happen? ____________________________________
Why 5: Why did that happen? ____________________________________
Root cause: ________________________________________________
4. Causal Factor Categories (Fishbone)
People: Training, competency, fatigue, supervision
Process: Procedures, work instructions, planning
Equipment: Design, maintenance, age, wear
Materials: Quality, specification, compatibility
Environment: Temperature, humidity, dust, vibration
Management: Policy, resources, priorities
5. Corrective Actions
Action 1: _____________________________________________________
Responsible: _______________ Due date: ____________
Action 2: _____________________________________________________
Responsible: _______________ Due date: ____________
Action 3: _____________________________________________________
Responsible: _______________ Due date: ____________
6. Verification
How will we verify the corrective action is effective? ____________
Review date: _______________ Reviewed by: __________________
When to Perform RCA
- Any safety incident or near-miss
- Any equipment failure that caused unplanned downtime
- Repeat failures — the same failure mode occurring more than twice
- Any failure with significant cost impact (above a threshold you define)
- Failures of critical equipment (A-class assets)
- Any environmental incident or regulatory non-compliance
Common RCA Pitfalls
- ✗Stopping at the symptom — 'the bearing failed' is not a root cause. Keep asking why until you reach a systemic cause you can fix.
- ✗Blaming people — most failures are caused by system/process issues, not individual mistakes. If a person made an error, ask why the system allowed the error to occur.
- ✗Jumping to solutions — complete the analysis before proposing corrective actions. Premature solutions often address symptoms, not root causes.
- ✗No follow-up — corrective actions that aren't verified are useless. Always set a review date to confirm the fix worked.