{"id":"changeover","model_id":"Changeover","name":"Changeover","summary":"Changeover is the process of switching production from one product or part number to another on a machine or on a series of linked machines by changing parts, dies, molds, fixtures and similar items. It is also called a setup. Changeover time is measured as the time elapsed between the last piece of the run just completed and the first good piece produced after the changeover.","study_notes":["Changeover applies both to single machines (e.g. stamping press, molding machine) and to linked machines (e.g. assembly line or cell).","Changeover is also referred to as a setup.","Changeover time starts at the last piece of the completed run and ends at the first good piece after the changeover.","The document cross-references Single Minute Exchange of Die (SMED); no further detail on SMED is given."],"safety_notes":[],"sources":[{"url":"https://www.lean.org/lexicon-terms/changeover/","title":"Changeover - Lean Enterprise Institute","accessed":"2026-10-25"}],"verification":{"status":"source_checked","checked_at":"2026-10-25","values":1,"method":"llm_source_check"},"updated_at":"2026-10-25","type":"operational","spec":{"kind":"methodology","related":[]},"url":"https://machineschema.com/operational/changeover","license":"https://creativecommons.org/licenses/by/4.0/"}