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
The Trim-Look Company makes several lines of skirts, dresses, and sport coats. Recently, a consultant suggested that the company reevaluate its South Islander line and allocate its resources to products that would maximize contribution to profits and to overhead. Each product requires the same polyester fabric and must pass through the cutting and sewing departments. The following data were collected for the study:
PROCESSING TIME (HR)
Product
Cutting
Sewing
Material (yd)
Skirt
1
1
1
Dress
3
4
1
Sport coat
4
6
4
The cutting department has 100 hours of capacity, sewing has 180 hours of capacity, and 60 yards of material are available. Each skirt contributes $5 to profits and overhead; each dress, $17; and each sport coat, $30.
a. Specify the objective function and constraints for this problem.
b. Use a computer package such as POM for Windows to solve the problem.
b) A company receives parts from suppliers to be used in its manufacturing departments.
The quality control department must perform two operations when shipments are
received:
Operation A – draw a random sample, package, and deliver to testing; and
Operation B – test the materials and issue a disposition report.
There are currently six shipments waiting to be processed. The time estimates for
processing these six shipments through quality control are given in the table below.
Shipment
Operation A (hours)
Operation B (hours)
A
1.5
1.0
В
1.1
2.7
1.2
1.4
D
0.7
1.6
E
1.6
1.5
F
1.9
2.9
Use Johnson's Rule to set the sequence of processing the shipments through
Quality Control.
i.
ii.
How much total time is required to process all the six shipments through Quality
Control? Show all times on a Gantt Chart.
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ABC Solutions is a traditional company in a textile industry with a combined workforce of 150 staff. Due to increased levels of competition, this company is now increasingly finding it difficult to compete – especially as the larger companies seem to be a little more innovative, agile and responsive to client requirements. Management have noticed that staff, especially the highly skilled ones, are now leaving the company to seek work elsewhere (in these larger companies). This has meant appointing new staff and undertaking a considerable amount of re-training to replace those that have left the company. Apart from impacting on core business operations, ABC Solutions has started witnessing a drop in its profit margin.
Given this position, senior management at ABC Solutions have decided to implement a performance measurement tool (PMT) that would allow them to align the strategic, management and operational requirements of the business. They are therefore considering the adoption of the…
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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