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Simple 5 Why Coaching for your Teams

Updated: Apr 11

The purpose of the Why Chain process is to search beyond the immediate cause of the problem and stop problem reoccurrence by finding the root cause of the issue.

 

By asking "why?" several times, you can find the root cause. This normally requires answering "Why?" at least three to five times.


To get started, try this: considering the problem statement and the current possible cause, say out load, "Why did/does (state the current Possible Cause) happen?"

 

That should generate a reason of some kind. If it is not the root cause, ask again, "So why did/does that happen?" Repeat this step until you have reached root cause.

 

Problem Example: A welding robot stops in the middle of its operation.

 

Why did the robot stop?

  •  Fuse in the robot has blown

Why is the fuse blown?

  •  Circuit overload

Why is the circuit overloaded?

  •  The bearings have damaged one another and locked up

Why have the bearings damaged one another?

  •  There was insufficient lubrication on the bearings

Why was there insufficient lubrication on the bearings?

  •  Oil pump on robot is not circulating sufficient oil

Why is the pump not circulating sufficient oil?

  •  Pump intake is clogged with metal shavings

Why is the intake clogged with metal shavings?

  • No filter on pump intake (as designed). ===> Root Cause

 



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