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Root Cause Analysis Methods – The Fishbone Diagram & The 5 Why’s

Maintenance & Reliability

Root Cause Analysis Methods – The Fishbone Diagram & The 5 Why’s

There are many approaches to performing Root Cause Analysis, including the Fishbone Diagram (the 6Ms, which stand for “machines, methods, materials, measurements, mother nature – aka environment, and manpower”) and the “5 Whys”. The “5 Whys” approach explores the underlying cause-and-effect relationships during the investigation of a particular problem. The root cause of the problem is arrived at by repeating the question “Why?” Each answer then forms the basis for the next question, and ultimately, the answer.

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