Job operation schedule

Job 100 has a cutting operation schedule to finish on 20/2/2020 but the production completed on 17/2/2020 and updated the time and expenses.

then new cutting operation will schedule to start on 18/2/2020. By right it should start on 20/2/2020 or 18/2/2020.

Can anyone give me the flow… SO -> Create Job and Plan scheduling? is this the right process?