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SMED Changeover

Study one changeover of a machine, a packing line or a sorter set-up the way Shigeo Shingo taught it. Time every element with a stopwatch, separate the work that needs the machine stopped from the work that can run while it produces, convert and streamline, and see the changeover time before and after, the Pareto of the stop and what the freed minutes are worth. The new sequence prints as the changeover standard.

The changeover

Changeover time runs from the last good piece of the old product to the first good piece of the new one at normal speed.

The five SMED steps

Space is the lap key. Each lap closes the element under way and starts the next; type its name while it runs or later in the list.

Type or paste elements

Times since the stop as m:ss; a plain number is minutes. With a start and an end the duration follows from them.

Or paste rows from Excel, columns in this order: element, category (1 to 4), duration, internal or external. Tabs, semicolons or commas all work, and a header row is skipped.

No elements yet. Time a changeover, type the elements in, or .

What a minute is worth optional

The cost of a machine-minute is what an hour of the line costs (people, machine, lost margin when it is full) divided by 60. Leave it empty to see the minutes only.

The study

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