Scheduling: It is the assignment of work to the facility with the specification of time. Scheduling is the time phase of loading specifying starting and end time for a particular work to be done.
Various steps taken to control the production schedule are as follows:
1. Data collection : to collect the data what is actually happening (Progress of work)
2. Data interpretation: Compare the collected data with the planned schedule.
3. Expediting: if there is any deviation found from the planned scheduled, a corrective action should be taken. This known as expediting.
4. Re-planning: In expediting, if it is found that it is impossible to perform according to plan, then it is necessary to re-plan the whole activities.