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Poke Yoke: What Is It?

Poka Yoke (po-kah yo-keh) is a Japanese term that literally means “Mistake Avoid”.  Translating to its English counterpart, it becomes “Error Proofing” and this is how it is used in Lean.

Error Proofing means using methods in a process step that helps our team-mates avoid making mistakes.  In other words, anything that makes it close to impossible to make a mistake becomes our Error Proofing ally in Lean.  The most common example of Error proofing is the household electrical plug – whose cable end is the exact shape and size to fit properly into the wall socket.  A USB stick that will only fit in a USB port in your computer is another great example of things that are nearly impossible to get wrong.

The idea translates to any work process with only a little imagination.  We have online forms with set, specific drop down menus, or character limits for credit card payment fields.  There are dispensers that only dispense the exact amount of an item required, and there are bar codes that are used to scan and record the exact item to avoid human error.

No matter what your line of business, you can find a way to “error proof” it.

By David McLachlan

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