Makers & production
How much machine time do the batches and changeovers require?
Multiply lots by lot size and seconds per part, then convert to minutes. Add one changeover for each boundary between lots. The machine starts ready for the first lot.
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Worked example
With the example inputs below, the calculator returns these results.
Parts scheduled 60
- Lots to make
- 3 lots
- Parts in each lot
- 20 parts
- Run time per part
- 45 s
- Changeover between lots
- 15 min
Other results
- Time producing parts
- 45 min
- Time in changeovers
- 30 min
- Total machine time
- 75 min
Use your own figures
Reserve machine time for both production and changeovers. Open the worksheet, replace the example values, then copy or print the result.
Batch changeover schedule →