Root Cause Analysis (RCA)
Root cause analysis (RCA) is a structured investigation method used after a failure or incident to identify the underlying cause rather than just the symptoms, ensuring corrective actions prevent recurrence.
Root cause analysis is a structured investigation method used to identify the fundamental reason a failure, defect, or incident occurred rather than simply addressing the visible symptoms. RCA traces the chain of events backwards from the observed problem to the deepest organisational, process, or design factor that, if corrected, would prevent recurrence. Common RCA techniques include the 5 Whys, fishbone (Ishikawa) diagrams, fault tree analysis, and barrier analysis. In maintenance contexts, RCA is typically triggered after a significant equipment failure, a safety incident, or a recurring defect that standard corrective actions have failed to resolve. The output of an RCA is a set of corrective and preventive actions assigned to responsible parties with target completion dates. A well-executed RCA also documents the investigation methodology, the evidence reviewed, and the logic connecting the root cause to the observed failure, creating a reference that can be applied to similar assets and situations across the organisation.
Why it matters
Without root cause analysis, maintenance teams fall into a cycle of fixing the same failures repeatedly, wasting labour and parts while exposing workers to avoidable hazards. RCA shifts the focus from reactive repair to systemic improvement. Organisations that embed RCA into their maintenance culture consistently report fewer repeat failures, lower unplanned downtime, and improved safety performance over time.
How MapTrack helps
MapTrack links every work order, inspection, and incident to the asset record, giving investigators a complete timeline of prior failures, parts replaced, and service history to support thorough root cause analysis.
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Frequently asked questions
What is the 5 Whys technique in root cause analysis?
The 5 Whys technique involves asking "why" repeatedly, typically five times, to drill past surface-level symptoms and reach the underlying cause. For example, if a pump failed, you ask why it failed (bearing seized), why the bearing seized (insufficient lubrication), why lubrication was insufficient (PM schedule was missed), why the PM was missed (no automated reminders), and why there were no reminders (the asset was not registered in the CMMS). The final answer reveals the systemic gap to fix.
When should a maintenance team perform root cause analysis?
RCA should be triggered after any significant or recurring equipment failure, any safety incident linked to equipment condition, any failure that results in extended production downtime, or when corrective maintenance costs for a particular asset exceed an agreed threshold. Many organisations also set a standing rule that any failure costing more than a defined dollar amount or causing more than a set number of hours of downtime automatically triggers a formal RCA.
What is the difference between RCA and a simple failure investigation?
A simple failure investigation typically identifies what broke and replaces or repairs the component. RCA goes further by asking why the failure happened in the first place and whether organisational, procedural, or design factors contributed. The goal of RCA is to produce corrective actions that address the systemic cause so the failure does not recur, rather than just restoring the asset to service.
Related terms
Corrective Maintenance
Corrective maintenance refers to repair or restoration work carried out after a fault, defect, or failure has been identified in an asset. It may be triggered by an operator report, a failed inspection, or an unexpected breakdown. Corrective tasks range from minor adjustments to major overhauls, depending on the severity of the issue.
Downtime
Downtime is any period during which an asset is unavailable for its intended function. It can be planned (scheduled maintenance, shutdowns, inspections) or unplanned (breakdowns, failures, waiting for parts). Downtime is typically measured in hours and expressed as a percentage of total available time, providing a key indicator of asset availability.
Work Order
A work order is a formal document or digital record that authorises and tracks a specific maintenance task. It typically includes the asset identification, description of work required, priority, assigned technician, parts needed, safety requirements, and completion details. Work orders provide a structured workflow from request through approval, execution, and closeout.
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