Mr. Ram Naresh has six jobs waiting to be processed through his machine. Processing tiime (in days) and due date information for each job are as follows :

Job Processing Time Due Date
A             2         3
B             1         2
C             4         12
D             3         4
E             4         8
F             5         10

Sequence the jobs by FCFS, SPT, SLACK and DDATE.

Calculate the average completion time and average tarbiness of the six jobs under each sequencing rule. Which rule would you recommend ?

Operations Management 2011

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