2.2.1 Job Characteristic
The first element in the scheduling problem is job characteristic where for each job j
the following features can be obtained;
Processing time (g ij ): the required time for processing job j on machine i.
Ready time (r j ): the arrival time of job j in the system for processing.
Due date (d i ): the time by which job j should be completed.
Weight (w i ): the weight (w i ) is the factor for determining the priority of execution
for each job i relative to the other jobs in the system