The following jobs are waiting to be processed at Rick Solano\'s machine center.
ID: 372517 • Letter: T
Question
The following jobs are waiting to be processed at Rick Solano's machine center. Solano's machine center has a relatively long backlog and sets a fresh schedule every 2 weeks, which does not disturb earlier schedules. Below are the jobs to be scheduled today, which is day 241 (day 241 is a work day). Job names refer to names of clients and contract numbers. Compute all times based on initiating work on day 241 Date Job Received 228 225 230 235 231 Job Due Date Duration (days) BR- 02 CX-01 DE-06 RG 05 300 270 320 360 310 15 25 35 40 30Explanation / Answer
EDD:
Total flow time = 25 + 40 + 70 + 105 + 145 = 385
% utilization metric = Total processing time / sum of total flow time = 145 / 385 = 37.6%
Average number of jobs in the system = Sum of total flow time / Total processing time = 385/ 145 = 2.66
Average lateness using EDD rule = 25+25 / 5 = 50/5 = 10
SPT:
Total flow time = 15 + 40 + 70 + 105 + 145 = 375
% utilization metric = 145/ 375 = 38.6
Avg number of jobs in the system = 375/145 = 2.56
Avg lateness = 10 + 25 + 25 / 5 = 60/5 = 12
Sequence Job Flow time Due date Starting from day 241 Job lateness 1 CX-01 25 270 30 0 2 BR-02 40 300 60 0 3 SY-11 70 310 70 0 4 DE-06 105 320 80 25 5 RG-05 145 360 120 25Related Questions
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