Root Cause Analysis (RCA) Fundamentals
Root cause analysis (RCA) involves gathering relevant facts and evidence, establishing a timeline of events, and verifying causality to identify the true root causes of a problem or disaster.
THE IDEA
RCA Fundamentals: Facts, Timelines and Causality
The first cornerstone for an RCA, or inquiry, is gathering relevant facts and evidence in enough detail. Secondly, we need to establish a timeline of what happened; after all, one thing can't cause another without occurring before, or at the same time, as something else. And then we need to cross‐check whether one thing is really causing the other or just loosely associated with it.3
Given that facts and evidence are central to an effective RCA or inquiry, the root causes of a specific setback, or disaster, will always depend on the precise facts and circumstances at the time. This is where forensic analysis comes in. And many of the crime and crash investigation programmes we can see on TV show us clearly how much can be involved to get to the truth.
When to use it
Investigating a product recall in manufacturing
Analyzing a data breach in IT
Determining the cause of a patient's adverse reaction to medication
FROM THEORY TO EVERYDAY LIFE
In practice
Manufacturing Defect Investigation
A factory produces defective parts. The RCA team gathers data on machine settings, operator logs, and material batches, creates a timeline of when defects appeared, and tests hypotheses about cause and effect to find the root cause (e.g., a worn-out cutting tool).
A MOMENT TO REFLECT
Put it to work.
What specific facts and evidence have you gathered when investigating a recent problem?
How can you create a detailed timeline to identify potential causal relationships?
In what ways might correlation be mistaken for causation in your analysis?
CONTINUE THE CONVERSATION
Source texts
- Beyond the Five Whys Root Cause Analysis and Systems Thinking (James C. Paterson)