Tardiness = ______ days Using the FCFS (first come, first served) decision rule

Question

Tardiness = ______ days

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 Job SY-11 RG-05 BR-02 DE-06 CX-01 Sequence Date Job Received 230 235 231 228 225 Job Due Date Duration (days) BR 02 CX-01 DE-06 RG 05 SY -11 320 360 310 300 270 35 40 30 15 25 4 The total flow time for the sequence developed using the FCFS rule 390 days (round your response to two decimal places) The percentage utilization for the sequence developed using the FCFS rule - 37.18 % (enter your response as a percentage rounded to two decimal places) The average number of jobs in the system for the sequence developed using the FCFS rule 2.69 jobs (round your response to two decimal places) The average tardiness (job lateness) for the sequence developed using the FCFS ule-days (round your response to two decimal places)

Explanation / Answer

Machine Process Processing time Flow in Flow out Due date Tardiness FCFS 1 SY 25 241 266 270 0 2 RG 15 266 281 300 0 Avg flow time 78 3 BR 35 281 316 320 0 WIP 2.689655 4 DE 30 316 346 310 36 Avg job lateness 12.4 5 CX 40 346 386 360 26 Utilization 0.371795 Makespan 145 Completion 390 Avg Tardiness 12.40

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