Author Question: Five jobs are waiting for processing through two work centres. Their processing time (in minutes) at ... (Read 29 times)

misspop · **on:** Dec 3, 2019

Question 1

Which of the following are limitations of rules-based dispatching systems?
◦ Rules may not recognize bottleneck resources
◦ Rules may not be able to prioritize two jobs with identical due dates.
◦ Rules need to be revised to adjust to changes in orders, product mix, and so forth.
◦ Rules may not recognize idle resources.
◦ All of the above are limitations.

Question 2

Five jobs are waiting for processing through two work centres. Their processing time (in minutes) at each work centre is contained in the table below. Each job requires work centre Alpha before work centre Beta. According to Johnson's rule, what is the optimum sequence of jobs and the minimum time for completion of all jobs?

Job	Alpha	Beta
R	20	10
S	25	35
T	50	20
U	15	35
V	55	75

◦ U-S-V-T-R; 200
◦ U-R-T-S-V; 175
◦ R-S-T-U-V; 240
◦ V-U-T-S-R; 250
◦ V-T-S-U-R; 225

EAN94 · **Reply #1 on:** Dec 3, 2019

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