1- Generally speaking, lower flow times are desirable when scheduling.

True

False

2- When the earliest due date (EDD) rule is applied to the sample of jobs, the resulting sequence is:

EFF, SDS, XC, RBP, ABC

SDS, EFF, ABC, XC, RBP

SDS, ABC, EFF, RBP, XC

ABC, RBP, XC, EFF, SDS

ABC, XC, RBP, SDS, EFF

3- Average flow time for the sample of jobs when sequenced by the first-come, first-served (FCFS) rule is approximate:

-1.8

14.2

15.2

13.4

-3.8

4- Average lateness for the sample of jobs when sequenced by the shortest processing time (SPT) rule is approximately:

-4.8

-5.7

2.6

13.9

9.5

5- Average flow time for the sample of jobs when sequenced by the earliest due date (EDD) rule is approximately:

9.5

13.2

11.4

14.6

-2.0

6- Based on average flow time results, the scheduling rule that appears most attractive given this sample of jobs is:

First come, first served (FCFS)

Earliest due date (EDD)

Shortest processing time (SPT)

All rules appear equally attractive based on the findings

ZOOM + You are working as a summer intern at a small Cincinnati company that manufactures machine parts. The director of operations has asked you to review the company's practices for scheduling customer orders. Currently, the company schedules work on a first come first served (FCFS) basis. The director of operations is wondering whether a shortest processing time (SPT) or earliest due date (EDD) sequencing rule might work better. Using the data table in Table 1, compare the effectiveness of the current and two alternative sequencing rules using both flow time and lateness metrics. Table 1: Job Scheduling Data Job XC EFF Date Order Received Mar 3 Mar 20 Feb 2 Febll Mar 8 Operating Time 5.1 3.2 4.5 8.0 1.5 Due Date 12 20 10 16 18 ABC RBP SDS Might there be other scheduling rules that the operation has yet to consider? What is a conservative next step (CNS) based on the analysis? What are the limitations of this analysis