Operations and Supply Chain Management 9th edition
9th Edition
ISBN: 9781119320975
Author: Roberta S. Russell, Bernard W. Taylor III
Publisher: WILEY
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Textbook Question
Chapter 13, Problem 4P
The Sofaworld Company purchases upholstery material from Barrett Textiles. The company uses 45,000 yards of material per year to make sofas. The cost of ordering material from the textile company is $1500 per order. It costs Sofaworld $0.70 annually to hold a yard of material in inventory. Determine the optimal number of yards of material Sofaworld should order, the minimum total inventory cost, the optimal number of orders per year, and the optimal time between orders.
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The materials manager for a billiard ball maker must periodically place orders for resin, one of the raw materials used in producing billiard balls. She knows that manufacturing uses resin at a rate of 50 kilograms each day, and that it costs $.04 per day to carry a kilogram of resin in inventory. She also knows that the order costs for resin are $100 per order, and that the lead time for delivery is four days.
If the order size was 1,000 kilograms of resin, what would be the average inventory level?
Karel Smith is the purchasing manager for the headquarters of a large insurance company with a central inventory operation. Karel’s fastest-moving inventory item has a demand of 6,000 units per year. The cost of each unit is $100, and the inventory carrying cost is $10 per unit per year. The average ordering cost is $30 per order. It takes about 5 days for an order to arrive, and the demand for 1 week is 120 units. (This is a corporate operation, and there are 250 working days per year.)
a) What is the EOQ?
b) What is the average inventory if the EOQ is used?
c) What is the optimal number of orders per year?
d) What is the optimal number of days in between any two orders?
e) What is the annual cost of ordering and holding inventory?
f ) What is the total annual inventory cost, including the cost of the 6,000 units?
Cherylene Brown has asked you to help her determine the best ordering policy for a new product. The demand for the
new product has been forecasted to be about 1,000 units annually. To help you get a handle on the carrying and
ordering costs, Cherylene has given you the list of last year's costs. She thought that these costs might be appropriate
for the new product.
Cost Factor
Taxes for the warehouse
Receiving and incoming inspection
New product development
Acct. dept. costs to pay invoices
Inventory insurance
Product advertising
Spoilage
Sending purchasing orders
Cost ($)
2,050
1,600
2,500
500
600
800
750
900
Cost Factor
Warehouse supplies
Research and development
Purchasing salaries & wages
Warehouse salaries & wages
Pilferage of inventory
Purchase order supplies
Inventory obsolescence
Purchasing dept. overhead
Cost ($)
300
2,750
30,000
12,800
800
500
300
1,000
She also told you that these data were compiled for 10,000 inventory items that were carried or held during the year. You…
Chapter 13 Solutions
Operations and Supply Chain Management 9th edition
Ch. 13.S - Prob. 1QCh. 13.S - How are steady-state results achieved in a...Ch. 13.S - Prob. 3QCh. 13 - Describe the difference between independent and...Ch. 13 - Distinguish between a fixed-order-quantity system...Ch. 13 - Discuss customer service level for an inventory...Ch. 13 - Explain the ABC inventory classification system...Ch. 13 - Identify the two basic decisions addressed by...Ch. 13 - Describe the major cost categories used in...Ch. 13 - Explain how the order quantity is determined using...
Ch. 13 - What are the assumptions of the basic EOQ model,...Ch. 13 - How are the reorder point and lead lime related in...Ch. 13 - Describe how the production quantity model differs...Ch. 13 - How must the application of the basic EOQ model be...Ch. 13 - Why do the basic EOQ model variations not include...Ch. 13 - In the production quantity EOQ model, what would...Ch. 13 - Explain in general terms how a safety stock level...Ch. 13 - Explain the difference between a single-stage...Ch. 13 - AV City stocks and sells a particular brand of...Ch. 13 - AV City (Problem 13.1) assumed with certainty that...Ch. 13 - A firm is faced with the attractive situation in...Ch. 13 - The Sofaworld Company purchases upholstery...Ch. 13 - The Wallace Stationery Company purchases paper...Ch. 13 - The Ambrosia Bakery makes calms for freezing and...Ch. 13 - The EastCoasters Bicycle Shop operates 364 days a...Ch. 13 - The Chemeo Company uses a highly toxic chemical in...Ch. 13 - The Food Place Supermarket stocks Munehkin...Ch. 13 - Kroft Foods makes cheese to supply to stores in...Ch. 13 - The Shotz Brewery produces an ale that it stores...Ch. 13 - Tradewinds Imports is an importer of ceramics from...Ch. 13 - JAL Trading is a Hong Kong manufacturer of...Ch. 13 - In Problem 12.1 in Chapter 12, the Hartley-Davis...Ch. 13 - In Problem 12-2 in Chapter 12, Carpel City orders...Ch. 13 - In Problem 12.47 in Chapter 12, Delaplane...Ch. 13 - The Paramount Paper company produces paper from...Ch. 13 - Kellys Tavern serves Shamrock draft beer to its...Ch. 13 - The daily demand for Ironcoat paint at the Top...Ch. 13 - IM Systems assembles microcomputers from genetic...Ch. 13 - IM Systems assembles microcomputers from generic...Ch. 13 - KVS Pharmacy fills prescriptions fen a popular...Ch. 13 - Food Place Market stocks frozen pizzas in a...Ch. 13 - The Mediterranean Restaurant stocks a red Chilean...Ch. 13 - The Aztec Company stock a variety of parts and...Ch. 13 - The EastCoasters Bicycle Shop stocks bikes;...Ch. 13 - Tara McCoy is the office administrator for the...Ch. 13 - The concession stand at the Shelby High School...Ch. 13 - The Instant Paper Clip Office Supply Company...Ch. 13 - The Texas Gladiators Apparel Store The Texas...Ch. 13 - Pharr Foods Company Pharr Foods Company produces a...
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