OPERATIONS MANAGEMENT IN THE SUPPLY CHAIN: DECISIONS & CASES (Mcgraw-hill Series Operations and Decision Sciences)
7th Edition
ISBN: 9780077835439
Author: Roger G Schroeder, M. Johnny Rungtusanatham, Susan Meyer Goldstein
Publisher: McGraw-Hill Education
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Chapter 12, Problem 1P
Students must complete two activities to register for class: registration and payment of fees. Because of individual differences, the processing time (in minutes) for each of these two activities for five students varies, as shown below:
| Minutes | ||
| Student | Registration | Pay Fees |
| A | 12 | 5 |
| B | 7 | 2 |
| C | 5 | 9 |
| D | 3 | 8 |
| E | 4 | 6 |
- a. Construct a Gantt chart to determine the total time required to process all five students. Use the following sequence of students: D, E, B, C, A.
- b. Can you construct a better sequence to reduce the total time required?
- c. What problems might be encountered in using this approach to registration in colleges?
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Students have asked these similar questions
Eight jobs have arrived in the following order:
Job
Processing Time
Due Date
1
7
23
2
3
9
3
5
8
4
2
11
5
6
16
6
9
18
7
14
40
8
4
31
Find and compare the performance measures for the following sequencing rules using the Excel Sequencing template. Round your answers to two decimal places.
Process in the order they have arrived
Flow Time
Lateness
Tardiness
Average
The figure below details the process flow for two types of customers who enter Barbara's Boutique shop for customized dress alterations. After step T1, Type A customers proceed to step T2 and then to any of the three workstations at T3, followed by steps T4 and T7. After step T1, Type B customers proceed to Step T5 and then steps T6 and T7. The numbers in parentheses are the minutes it takes to process a customer.
c. Assuming that the arrival rate is greater than five customers per hour, when would you expect Type A customers to experience waiting lines, assuming no Type B customers in the shop?
A.
Steps T3 and T4.
B.
Steps T1, T2, and T4.
C.
Steps T1, T2, T3, and T4.
D.
Step T3 only.
The following table shows orders to be processed at a machine shop as of 8:00 a.m. Monday. The jobs have different operations they must go through. Processing times are in days. Jobs are listed in order of arrival.
Job Processing
Time (Days) Due Date
(Days) Remaining Number
of Operations
A 8 20 2
B 10 18 4
C 5 25 5
D 11 17 3
E 9 35 4
Click here for the Excel Data File
a. Determine the processing sequence at the first work center using each of these rules: (1) First come, first served, (2) Slack per operation. (Hint: In case of a tie choose the jobs in alphabetical order.)
b. Compute the effectiveness of each rule using each of these measures: (1) average completion time, (2) average number of jobs at the work center. (Round your answers to 2 decimal places.)
Chapter 12 Solutions
OPERATIONS MANAGEMENT IN THE SUPPLY CHAIN: DECISIONS & CASES (Mcgraw-hill Series Operations and Decision Sciences)
Ch. 12 - What types of scheduling decisions are management...Ch. 12 - Specify the kinds of objectives that might be...Ch. 12 - Prob. 3DQCh. 12 - How is the scheduling of patients in a doctor's...Ch. 12 - Describe the differences between Gantt charting,...Ch. 12 - Why are m n ma chine-scheduling algorithms not...Ch. 12 - What is the purpose of a planning and control...Ch. 12 - Prob. 8DQCh. 12 - Prob. 9DQCh. 12 - What scheduling rule should be applied to...
Ch. 12 - Prob. 11DQCh. 12 - Students must complete two activities to register...Ch. 12 - Prob. 2PCh. 12 - Sequence the jobs shown below by using a Gantt...Ch. 12 - In problem 3, assume there are two machines of...Ch. 12 - In problem 2, assume there are two machines of...Ch. 12 - The Security Life Insurance Company processes all...Ch. 12 - At the University Hospital, five blood samples...Ch. 12 - Prob. 8PCh. 12 - Prob. 9PCh. 12 - Using the Gantt charts developed in the following...Ch. 12 - How would the theory of constraints be used to...
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