Immediate, Contributing and Root Causes
This concept distinguishes between immediate causes (direct triggers), contributing causes (enabling conditions), and root causes (underlying reasons) of events. Root cause analysis (RCA) is a systematic approach to identify fundamental issues to prevent recurrence.
THE IDEA
Immediate, Contributing and Root Causes
If someone asks, ‘Why did the Titanic sink?’, the reply, ‘Because it hit an iceberg’, is a reasonable first answer. Specifically, the immediate cause that led to the sinking of the Titanic was that it hit an iceberg whilst travelling at around 20 knots on 14 April 1912.
However, an immediate cause is not the same as a root cause.
An immediate cause is the event or trigger that sets off a chain of events that results in an adverse outcome: think of a spark that might light a fire.
A contributing cause is something that ‘sets the stage’ for an immediate cause to create an adverse impact: think of dry tinder on a forest floor or the limited number of lifeboats on the Titanic.
So, beyond immediate and contributing causes, root causes are the reasons why things didn't go as planned.
Root cause analysis (RCA) describes a range of tools and techniques that examine what, when, where and how something happened, and who was involved, but ultimately seek to understand why something happened. It's about properly diagnosing an illness and – if we can – finding a cure, not just offering ‘sticking plaster’ solutions.2 So, RCA can help you better understand what can be done to stop problems from arising in the first place, or if you can't prevent problems, be clear about what can be done to make any setbacks tolerable.
When to use it
Investigating a project failure to prevent future issues.
Analyzing a medical error to improve patient safety protocols.
Troubleshooting a recurring technical bug in software development.
Improving business processes by identifying underlying inefficiencies.
FROM THEORY TO EVERYDAY LIFE
In practice
Sinking of the Titanic
The iceberg collision is an immediate cause of the Titanic’s sinking. Limited lifeboat capacity contributed to the consequences for people trying to evacuate, rather than to the ship taking on water. A deeper investigation asks why decisions about navigation, design, and evacuation left those vulnerabilities.
A MOMENT TO REFLECT
Put it to work.
For a recent problem, what was the immediate trigger, what conditions enabled it, and which underlying decisions or arrangements would you investigate further?
How can you distinguish between a contributing cause and a root cause in a complex system? Give an example from your experience.
Why might organizations focus on immediate causes instead of root causes, and what are the consequences?
CONTINUE THE CONVERSATION
Source texts
- Beyond the Five Whys Root Cause Analysis and Systems Thinking (James C. Paterson)