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 order is (assume that jobs came in the order in which they are listed in the table): The average tardiness (job lateness) for the sequence developed using the FCFS rule = 6 days (roundyour response to two decimal places). The average completion time for the sequence developed using the FCFS rule = Q days (roundyour response to two decimal places). An Alabama lumberyard has four jobs on order, as shown in the following table. Today is day 205 on the yard's schedule. In what sequence would the jobs be ranked according to the decision rules on the left: All dates are specified as manufacturing planning calendar days. Assume that all jobs arrive on day 205. Compute all times based on initiating work on day 205.

Explanation / Answer

--

The average tardiness = 6 days

The average completion time = 217.25 days

--

--

Job ID Day Arrived Production Time (Duration) Due Date Order Adding cumulatively = Flow Time Completion Time + Production Time = Completion Time Completion Time - Due date = Tardiness A 205 3 209 1st 3= 3 209 208-209= 0 B 205 4 208 2nd 3+4= 7 208+4= 213 213-208= 5 C 205 8 210 3rd 7+8= 15 212+8= 221 221-210= 11 D 205 5 212 4th 15+5= 20 220+5= 226 226-212= 14 Total 20 45 869 30 Average 11.25 217.25 7.5

Related Questions

Navigate

• Browse (All)
• Browse U
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.