Priority Scheduling: It refers to the continuous changing in production sequence and the evaluation of the change process based on the urgency of the products.

There are three types of priority scheduling and they are explained below:

1. First come –first served basis: In this production operation basically the order which is taken up first will be produced first.

2. Earliest date: The earliest promised date of delivery will be produced first.

3. Shortest Operating time: In this type of operation the jobs which require the least operating time are taken up first and they will be finished first.