Tag Archives: logic

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, or 5Y) technique. This method is especially popular in manufacturing, where the main concern is often productivity -- maximizing production rate and minimizing rejects. I've heard many Six Sigma and Lean practitioners talk about this as one of their favourite tools. I can understand why, too... it's easy to remember, simple to apply, and gets deeper than traditional problem solving. However, it also contains some traps.
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