From the Lean Lexicon

Changeover
The process of switching from the production of one product or part number to another in a machine (e.g., a stamping press or molding machine) or a series of linked machines (e.g., an assembly line or cell) by changing parts, dies, molds, fixtures, etc. (Also called a setup.) Changeover time is measured as the time elapsed between the last piece in the run just completed and the first good piece from the process after the changeover.

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