Reducing the time required to convert a process from the last part of the previous product to the first good part of the next product. 

The six steps in changeover time reduction are: 

1. Measure the total changeover time in the current situation.
   
2. Identify the internal and external elements and calculate the individual times.
   
3. Convert as many internal elements into external elements as possible.
   
4. Reduce the time for the remaining internal elements.
   
5. Reduce the time for the external elements.
   
6. Standardize the new procedure. 

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