Work out cycle time for machine instantly with clear inputs, formula shown and shareable results.
Nominal cycle time understates reality because of micro-stoppages, quality holds and operator interventions, so it is divided by operating efficiency to get an effective cycle. Adding set-up gives batch time, and the changeover share shows whether smaller batches are affordable.
Effective cycle
Effective cycle = nominal cycle / efficiency
Batch time
Hours = parts x effective cycle / 3600 + changeover / 60
Effective cycle = nominal cycle / efficiency. Nominal cycle time understates reality because of micro-stoppages, quality holds and operator interventions, so it is divided by operating efficiency to get an effective cycle.
It sets the economic batch size. If changeover is 30 percent of batch time, halving the batch makes it nearly half the time, which is the whole argument for quick-change tooling.
This calculator takes 4 inputs: Parts in batch, Machine cycle time, Operating efficiency, Set-up and changeover. The pre-filled defaults are a realistic worked example — replace them with your own site or project figures.