Operations Management
17th Edition
ISBN: 9781259142208
Author: CACHON, Gérard, Terwiesch, Christian
Publisher: Mcgraw-hill Education,
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Chapter 13, Problem 13CQ
Summary Introduction
To identify: The most likely result.
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Weekly demand for Lego at a Wal-Mart store is normally distributed with a mean of 2,500 boxes and a standard deviation of 500. Demand is assumed to be stationary and the mean demand is used as forecast. Each order costs Wal-Mart $145 and holding cost per box per year is estimated at $1.5. Lead time is 2 weeks and the store manager has decided to review inventory every 4 weeks. (Assume a periodic review policy)
a. What is safety stock requirement for a service level of 90%?
b. What is the order-up-to level?
c. What is the total annual variable cost?
A warehouse manager at Mary Beth Marrs Corp. needs to simulate the demand placed on a product that does not fit
standard models. The concept being measured is "demand during lead time," where both lead time and daily demand are
variable. The historical record for this product, along with the cumulative distribution, appear in the table.
Demand During
Lead Time
Cumulaive
Probability
Probability
120
0.01
0.01
140
0.12
0.13
160
0.35
0.48
180
0.20
0.68
200
0.04
0.72
220
0.08
0.80
240
0.20
1.00
The following random numbers have been generated: 9, 78, 40, 41, and 99. (Note: Assume the random number interval
begins at 01 and ends at 00.)
Based on the given probabilty distribution, for the given random number the demand during the lead time is:
Random Number
9
78
40
41
99
Demand
The average demand during the lead time is
(enter your response as an integer).
The total demand during the lead time based on the five simulations is (enter your response as an integer).
Demand in each period is normally distributed with a mean of 100 and standard deviation of 50. Assuming demand across periods are independent, what is the standard deviation of the total demand over 4 periods?
Chapter 13 Solutions
Operations Management
Ch. 13 - Which of the following is NOT true about the...Ch. 13 - A newsvendor orders the quantity that maximizes...Ch. 13 - Prob. 3CQCh. 13 - Suppose the newsvendor model describes a firms...Ch. 13 - Prob. 5CQCh. 13 - Prob. 6CQCh. 13 - A retailer has two merchandizers, Sue and Bob, who...Ch. 13 - Prob. 8CQCh. 13 - Which of the following changes in the in-stock...Ch. 13 - Prob. 10CQ
Ch. 13 - Prob. 11CQCh. 13 - Prob. 12CQCh. 13 - Prob. 13CQCh. 13 - Prob. 14CQCh. 13 - Dan McClure owns a thriving independent bookstore...Ch. 13 - Flextrola, Inc., an electronics systems...Ch. 13 - Monsanto sells genetically modified seed to...Ch. 13 - Fashionables is a franchisee of The UnLimited, the...Ch. 13 - Teddy Bower is an outdoor clothing and accessories...Ch. 13 - Prob. 6PACh. 13 - Goop Inc. needs to order a raw material to make a...Ch. 13 - Geoff Gullo owns a small firm that manufactures...Ch. 13 - Prob. 9PACh. 13 - Prob. 10PACh. 13 - Prob. 11PA
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- Q: A hardware company stocks nuts and bolts and orders them from a local supplier once every 2 weeks (10 working days). Lead time is 2 days. The company has determined that the average demand for 1⁄2 inch bolts is 150 per week (5 working days), and it wants to keep a safety stock of 3 days’ supply on hand. An order is to be placed this week, and the stock on hand is 130 bolts.a. What is the target level?b. How many 1⁄2 inch bolts should be ordered this time?arrow_forwardA book and paper store distributes one specialized monthly magazine. When looking at the sales the last years, they have concluded that the demand for each issue of the magazine will be normally distributed with an expected sale of 250 and a standard deviation of 100. The purchase price for the magazine is $20. and the sales price is $50.The store has an agreement with a second -hand store that buys unsold magazines for $5 each. How many magazines should the store buy of each issue?arrow_forward13 Pam’s demand for hats is normally distributed with mean 500 and standard deviation 100. She sells her hats for $50 each and buys hats for $10 each, and anything she can't sell by the end of the year, the wholesaler will buy for $5 each. How many hats should she order for next year to maximize profit?arrow_forward
- Dan’s Independent Book Store is trying to decide on how many copies of a book to purchase at the start of the upcoming selling season. The book retails for $28.00. The publisher sells the book to Dan at $20.00. Dan can dispose of all of the unsold copies of the book at 50% off the retail price, at the end of the season. Dan estimates that demand for this book during the season is Normal with a mean of 1000 and a standard deviation of 250. Question 1: What is the quantity that Dan should order to maximize his expected profit?arrow_forwardWeekly demand for a certain type of automotive spark plug in a local repair shop is normallydistributed with mean 34 and standard deviation 12. Procurement lead time is six weeks.Determine the lead time demand distribution.arrow_forwardAnnual demand for number 2 pencils at the campus store is normallydistributed with mean 1,000 and standard deviation 250. The store purchases thepencils for 6 cents each and sells them for 20 cents each. There is a two-monthlead time from the initiation to the receipt of an order. The store accountantestimates that the cost in employee time for performing the necessary paperworkto initiate and receive an order is $20, and recommends a 22 percent annual interest rate for determining holding cost. The cost of a stock-out is the cost of lostprofit plus an additional 20 cents per pencil, which represents the cost of loss ofgoodwill.b. Find the simultaneous optimal values of Q and R.arrow_forward
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