Operations Management: Processes and Supply Chains (11th Edition)
11th Edition
ISBN: 9780133872132
Author: Lee J. Krajewski, Manoj K. Malhotra, Larry P. Ritzman
Publisher: PEARSON
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Chapter 14, Problem 12P
Summary Introduction
Interpretation: Whether the company should purchase additional vehicles and hire drivers, under the expected value approach, is to be determined and the required number is to be calculated.
Concept Introduction: In order to accommodate its expansion, the company has to buy new vehicles between 25 and 40.
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Transworld Deliveries is expanding its contract home delivery service into the Northeastern United States. The company anticipates that to accommodate this expansion it will need between 25 and 40 staffed delivery vehicles. Transworld is currently moving 25 of its own vehicles, with drivers, into the Northeast. The daily cost of operating its own fleet is $820 per vehicle, while the daily cost of leasing a vehicle and driver is expected to be $1,200 per vehicle. The expected demand requirements follow:
Requirements (in vehicles)
25
30
35
40
Probability
0.25
0.25
0.25
0.25
Using an expected value approach, should Transworld purchase additional vehicles and hire additional drivers? If so, how many would you recommend?
The Ashton Furniture Company manufactures coffee tablesand chest of drawers. Last year the company’s cost ofgoods sold was $3,700,000, and it carried inventory of oak,pine, stains, joiners, and brass fixtures, work-in-process offurniture frames, drawers and wood panels, and finishedchests and coffee tables. Its average inventory levels for a52-week business year were as follows.
Determine the number of inventory turns and the days ofsupply for the furniture company.
Raw Materials Average Inventory Unit CostOak 8000 $6.00Pine 4500 4.00Brass fixtures 1200 8.00Stains 3000 2.00Joiners 900 1.00Work-in-ProcessFrames 200 $30Drawers 400 10Panels 600 50Chests 120 110Tables 90 90Finished GoodsChests 300 $500Coffee tables 200 350
The MaskMake Company manufactures a variety of masks for the healthcare professionals
around Ireland. Company vans are used to deliver local orders directly to retail outlets. When
their business was small, the drivers of the vans were free to take routes of their choice as they
made the delivery rounds to the retail outlets.
However, as the business has grown recently due to the outbreak, transportation and delivery
costs have become significant. In an effort to improve the efficiency of the delivery operation,
MaskMake management would like to determine the shortest delivery routes between retail
outlets. For example, the following network shows the roads (distance in km) that may be taken
between a retail outlet at node 1 and a retail outlet at node 11.
3
3
6
10
11
6
4
10
1
7
4
2
4
10
Determine the shortest route for a van that is currently at node 1 and must make a delivery to
node 11.
2.
3.
Chapter 14 Solutions
Operations Management: Processes and Supply Chains (11th Edition)
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