Operations Management: Processes And Supply Chains (12th Global Edition) - Does Not Include Mylab Operations Management
12th Edition
ISBN: 9780134890357
Author: Lee J. Krajewski, Manoj K. Malhotra
Publisher: Pearson Global Edition
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Chapter 9, Problem 17P
In a continuous review inventory system, the lead time for door knobs is 5 weeks. The standard deviation of demand during the lead time is 85 units. The desired cycle-service level is 99 percent. The supplier of door knobs streamlined its operations and now quotes a 1-week lead time. How much can safety stock be reduced without reducing the 99 percent cycle-service level?
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A pharmacist is trying to determine the inventory order and stock levels for a particular drug. The following information is available about the drug.
Demand (D)
85 tablets/week
Working weeks per year
52 weeks
Unit holding cost per year (H)
$6
Order cost (S)
$44/order
Standard deviation of weekly demand (sd)
15 tablets
Lead time (L)
2 weeks
Desired cycle service level
95%
If the pharmacist uses the continuous review (Q) system to control the inventory of the drug, what would be the order quantity and reorder point?
If the pharmacist uses the periodic review (P) system to control the inventory of the drug, what would be the review interval and target inventory level? (Hint: Use the EOQ model to derive the review interval P)
SAFETY STOCK WITH PROBABILISTIC DEMAND
Memphis Regional Hospital stocks a “code blue” resuscitation kit that has a normally distributeddemand during the reorder period. The mean (average) demand during the reorder period is 350 kits,and the standard deviation is 10 kits. The hospital administrator wants to follow a policy that results instockouts only 5% of the time.(a) What is the appropriate value of Z ? (b) How much safety stock should the hospital maintain?(c) What reorder point should be used?APPROACH c The hospital determines how much inventory is needed to meet the demand 95% of thetime. The figure in this example may help you visualize the approach. The data are as follows:m = Mean demand = 350 kitssdLT = Standard deviation of demand during lead time = 10 kitsZ = Number of standard normal deviations
Fisk Corporation is trying to improve its inventory control system and has installed an online system at its retail stores. Fisk anticipates
sales of 58,800 units per year, an ordering cost of $4 per order, and carrying costs of $1.50 per unit. In the second year, Fisk
Corporation finds that it can reduce ordering costs to $1 per order, but carrying costs will stay the same at $1.50 per unit.
a-1. What is the economic ordering quantity for the second year?
Economic ordering quantity (EOQ)
a-2. How many orders will be placed during the second year?
Number of orders
a-3. What will the average inventory be for the second year?
Average inventory
Total costs
units
units
a-4. What is the total cost of ordering and carrying inventory for second year?
LA
Chapter 9 Solutions
Operations Management: Processes And Supply Chains (12th Global Edition) - Does Not Include Mylab Operations Management
Ch. 9 - What is the relationship between inventory and the...Ch. 9 - Suppose that a large discount retailer with a lot...Ch. 9 - Will organizations ever get to the point where...Ch. 9 - A part is produced in lots of 1,000 units. It is...Ch. 9 - Prince Electronics, a manufacturer of consumer...Ch. 9 - Terminator, Inc. manufactures a motorcycle part in...Ch. 9 - Ruby-Star Incorporated is considering two...Ch. 9 - Haley Photocopying purchases paper from an...Ch. 9 - Prob. 6PCh. 9 - Southern Markets, Inc. is considering the use of...
Ch. 9 - New Wave Shelving’s inventory manager would like...Ch. 9 - Yellow Press, Inc. buys paper in 1,500-pound rolls...Ch. 9 - Babble, Inc. buys 400 blank cassette tapes per...Ch. 9 - At Dot Com, a large retailer of popular books,...Ch. 9 - Leaky Pipe, a local retailer of plumbing supplies,...Ch. 9 - Sam’s Cat Hotel operates 52 weeks per year, 6...Ch. 9 - Consider again the kitty litter ordering policy...Ch. 9 - In a Q system, the demand rate for strawberry ice...Ch. 9 - Petromax Enterprises uses a continuous review...Ch. 9 - In a continuous review inventory system, the lead...Ch. 9 - In a two-bin inventory system, the demand for...Ch. 9 - You are in charge of inventory control of a highly...Ch. 9 - Your firm uses a continuous review system and...Ch. 9 - A company begins a review of ordering policies for...Ch. 9 - Prob. 22PCh. 9 - The Farmer’s Wife is a country store...Ch. 9 - Prob. 24PCh. 9 - Prob. 25PCh. 9 - Prob. 26PCh. 9 - In a P system, the lead time for a box of...Ch. 9 - Suppose that Sam’s Cat Hotel in Problem 13 uses...Ch. 9 - Your firm uses a periodic review system for all...Ch. 9 - Using the same information as in Problem 21,...Ch. 9 - Wood County Hospital consumes 1,000 boxes of...Ch. 9 - A golf specialty wholesaler operates 50 weeks per...Ch. 9 - What is the EOQ and what is the lowest total cost?Ch. 9 - What is the annual cost of holding inventory at...Ch. 9 - Prob. 3AMECh. 9 - Prob. 4AMECh. 9 - Prob. 5AMECh. 9 - Prob. 6AMECh. 9 - Comment on the sensitivity of the EOQ model to...Ch. 9 - Consider the pressures for small versus large...Ch. 9 - Prob. 2VCCh. 9 - The Marker Maker© product recently experienced an...Ch. 9 - Put yourself in Sue McCaskey’s position and...Ch. 9 - By how much do your recommendations for these two...
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