Understanding Root Cause Analysis
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by Uday Denduluri
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Root cause Analysis Tools

We have some predefined set of tools that help in the Root Cause Analysis. We choose the tool based on the problem that we encounter.

5 Whys – Mostly used with problems involving human factors or interactions.

Barrier Analysis – Treats the problem as a barrier and tries to remove the barrier.

Change Analysis – Mainly works on the Risk areas and tries to expose the same.

Failure mode and effects analysis – Commonly used to evaluate risk management priorities for mitigating known threat-vulnerabilities.

Fish-Bone Diagram or Ishikawa diagram or Cause and Effect Diagram – The fishbone will help to visually display the many potential causes for a specific problem or effect.

Pareto Analysis – A statistical technique in decision-making that is used for selection of a limited number of tasks that produces significant overall effects.

Fault Tree Analysis – Visual models showing the logical relationships between the equipment failures, human errors and external events that cause the problem.

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User Comments

Title: Root Cause Analysis   
Name: Chuck
Date: 2008-06-12 11:16:15 PM
You can get some free videos at
Title: More on Root Cause Analysis   
Name: Jane V.
Date: 2007-06-05 4:29:48 AM
Thanks for the overview. Another excellent source on Root Cause Analysis is: http://www.12manage.com/methods_root_cause_analysis.html
Title: Understanding Root Cause Analysis   
Name: Naveen
Date: 2007-05-17 7:25:45 AM
Some of the text in "Figure 3" of this article is not readable. Can someone upload a better picture?

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