Root Cause Code
A root cause code is a controlled classification used to record the verified underlying cause of a maintenance failure or recurring problem.
What this term means in maintenance
A root cause code is a controlled classification used to record the verified underlying cause of a maintenance failure or recurring problem.
Purpose of root cause codes
Root cause codes help organizations identify recurring underlying conditions across many work orders and assets.
Examples may include:
- Incorrect installation
- Contamination
- Misalignment
- Inadequate lubrication
- Design weakness
- Operating outside limits
- Incorrect material
- Procedure not followed
- Inadequate inspection
- Supplier defect
Verification matters
A root cause code should be selected only when the cause is supported by evidence. Otherwise, the record may use “cause under investigation” or another controlled state.
Practical example
A bearing seizure is investigated and confirmed to result from water ingress through a damaged seal. The root cause code should reflect the verified ingress or sealing-control failure rather than simply “bearing failure.”
Relationship to failure codes
Failure codes describe how equipment failed. Root cause codes describe why it failed.
Common mistake
Making root cause mandatory for every routine work order encourages technicians to guess, weakening the reliability of the data.
Related concepts
Related maintenance terms
Keep exploring connected CMMS, reliability, and maintenance planning terms.
Root Cause Analysis
Root cause analysis is a structured investigation used to identify the underlying conditions that allowed a failure or problem to occur and determine actions that reduce recurrence.
Failure Code
A failure code is a controlled classification used to record how an asset or component failed in a consistent, reportable way.
Failure Reporting, Analysis and Corrective Action System
FRACAS is a closed-loop process for recording failures, analyzing causes, assigning corrective actions, and verifying that reliability improves.
Glossary FAQs
- When should a root cause code be selected?
Only when the underlying cause is supported by evidence.
- Is root cause the same as failure mode?
No. Failure mode describes how the asset failed, while root cause explains the underlying reason.
- Should root cause be mandatory on every work order?
Usually not. Mandatory selection without evidence encourages guessing.