Table J.16 Five Jobs Are Currently Waiting to Be Processed. Each Job

Multiple Choice

Table J.16
Five jobs are currently waiting to be processed. Each job has to go through Machine 1 first and then Machine 2 before it is completed. The processing times (in hours) for the five jobs on each machine are:

-Use the information in Table J.16. What is the makespan through both machines if the SPT rule is used to determine the sequence at Machine 1 and the same sequence is also used at Machine 2?

A) fewer than or equal to 27 hours
B) greater than 27 hours but fewer than or equal to 28 hours
C) greater than 28 hours but fewer than or equal to 29 hours
D) greater than 29 hours