Why Do Kaizen Improvements Disappear After a Few Months?

A manufacturing company conducts a Kaizen project.

Production increases from 800 to 950 units per shift.

Everyone celebrates the improvement.

But three months later, production drops to 830 units.

What went wrong?

The improvement was implemented, but it was never properly sustained.

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Operators returned to old methods. New employees were not trained. Supervisors stopped monitoring the improved process.

The solution?

Every Kaizen improvement needs three things:

1. Standardization: Update the working method.
2. Ownership: Assign someone responsible for sustaining the improvement.
3. Monitoring: Regularly verify that the results continue.

Remember: A Kaizen project is not successful just because performance improved once. It succeeds when the improvement lasts.

Discussion: Have you seen successful Kaizen improvements disappear in your factory? What caused it?