Using the FCFS (first come, first served) decision rule for sequencing the jobs,

Question

Using the FCFS (first come, first served) decision rule for sequencing the jobs, the The following jobs are waiting to be processed at Rick Solano's machine center order is: 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. Sequence Job Date Job Due Date Duration (days Job RG 05 228 31040 30 15 25 Received 231 225 BR-02235 360 CX-01 DE-06 300 270 SY-11 230 35 The total flow time for the sequence developed using the FCFS rule days round your response to two decimal places) The percentage utilization for the sequence developed using the FCFS rule . (onter your response as a percentage rounded to two decimal places) Enter your answer in each of the answer boxes.

Explanation / Answer

Using FCFS rule

Sequence Job Duration time Starting of Job Completion of job Tardiness

1 RG-05 25 241 265 -5

2 DE-06 15 266 280 5

3 SY-11 35 281 315 -5

4 CX-01 30 316 345 35

5 BR-02 40 346 385 25

Total flow time of the job= 25+15+35+30+40= 145 days

Tardiness in the process=-5+5-5+35+25=55 days

Percentage utilization of the sequence=145-55/145=62%

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