OPS.8.2:5.2 - A free machine but an unavailable setter

A machine must be ready for its protected job at 09:30. There is no earlier-call requirement in this case. An auxiliary trial needs five minutes of setup by a setter, twenty minutes of unattended machine time and five minutes of restoration by that setter. The setter is available from 09:00 to 09:20 and then from 09:40. The protected job’s operator is available at 09:30.

The duration sum is thirty minutes. But setup at 09:00–09:05 and running at 09:05–09:25 leave restoration waiting until 09:40–09:45. The trial does not fit the protected start.

If a separately useful ten-minute trial is available, setup at 09:00–09:05, running at 09:05–09:15 and restoration at 09:15–09:20 fit both calendars. The machine is ready before 09:30. Alternatively, prepare a different unit or obtain another qualified setter; merely labeling the trial low priority changes none of these times.

This arrangement protects the named start. It has not established immediate recall during the trial’s indivisible machine cycle.