Necessary and Sufficient
Causes and Causal Factors can usually be characterized as having two distinct but related qualities, termed Necessary and Sufficient. Necessary: If x is required...
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For the term ""necessary and sufficient"".
Top 5 Reasons for Failed Root Cause Analysis
Root cause analysis is one of the best ways to solve difficult or significant problems, but sometimes, root cause analysis efforts fail because the corrective actions weren’t...
Evaluating the Quality of a Root Cause Analysis
The quality of a Root Cause Analysis (RCA) and its Corrective Action Plan (CAP) should be evaluated many times over its lifecycle (i.e., from initial problem or...
Recent Changes
Recent changes to this Root Cause Analysis wiki are logged below. 2014-10-04 :: topic pages Barrier and Root Cause created 2014-10-02 :: topic pages Event...
RCA Wiki
This page is the root for the new Root Cause Analysis wiki. Only the topic pages listed below have been completed. As more pages...
Causal Factor Tree Analysis
Description Causal factor tree analysis is a Root Cause Analysis technique used to record and display, in a logical, tree-structured hierarchy, all the actions and...
Five-by-Five Whys
Search around on the web for Root Cause Analysis, and you’re likely going to find article after article discussing the Five Whys (or 5 Whys,...
Models in Root Cause Analysis
Models are representations of reality. They can be detailed or abstract, complex or simple, accurate or misleading. Whether we realize it or not, everything we...
Meaning of Root Cause, Part II
A previous article discussed the definition of the word root as it applies to the concept of Root Cause. However, that article did not provide...
The BOGUS Test
The fields of incident investigation and root cause analysis are over-abundantly supplied with acronyms, like E&CF, ETBA, MORT, MES, etc. After much investigation, I’ve determined...