Operations Management
13th Edition
ISBN: 9781259667473
Author: William J Stevenson
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 13, Problem 19P
Given this information:
Expected demand during lead time = 300 units
Standard deviation of lead time demand = 30 units
Determine each of the following, assuming that lead time demand is distributed normally:
a. The ROP that will provide a risk of stockout of 1 percent during lead time.
b. The safety stock needed to attain a 1 percent risk of stockout during lead time.
c. Would a stockout risk of 2 percent require more or less safety stock than a 1 percent risk? Explain. Would the ROP be larger, smaller, or unaffected if the acceptable risk were 2 percent instead of 1 percent? Explain.
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Given this information:
Given this information:Expected demand during lead time = 300 unitsStandard deviation of lead time demand = 30 unitsDetermine each of the following, assuming that lead time demand is distributed normally:a. The ROP that will provide a risk of stockout of 1 percent during lead time.b. The safety stock needed to attain a 1 percent risk of stockout during lead time.c. Would a stockout risk of 2 percent require more or less safety stock than a 1 percent risk?Explain. Would the ROP be larger, smaller, or unaffected if the acceptable risk were 2 percentinstead of 1 percent? Explain.
2) Daily demand for a product is normally distributed with a mean of 100 and a standard deviation of 12.
The lead time is normally distributed with a mean of 5 days and a standard deviation of 1.5 days.
a) What is the ROP to satisfy a %90 probability of not stocking out?
b) What is the safety stock?
c) What is the probability of stocking out if the manager has decided not to keep any safety stock?
What is the Z value, and what is the probability?
Chapter 13 Solutions
Operations Management
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Ch. 13 - What is meant by the term service level? Generally...Ch. 13 - Describe briefly the A-B-C approach to inventory...Ch. 13 - The purchasing agent for a company that assembles...Ch. 13 - Explain how a decrease in setup time can lead to a...Ch. 13 - What is the single-period model, and under what...Ch. 13 - Can the optimal stocking level in the...Ch. 13 - Prob. 17DRQCh. 13 - What trade-offs are involved in each of these...Ch. 13 - Who needs to be involved in inventory decisions...Ch. 13 - How has technology aided inventory management? How...Ch. 13 - To be competitive, many fast-food chains began to...Ch. 13 - As a supermarket manager, how would you go about...Ch. 13 - Sam is at the post office to mail a package. After...Ch. 13 - Give two examples of unethical conduct involving...Ch. 13 - Prob. 1PCh. 13 - a. The following table contains figures on the...Ch. 13 - A bakery buys flours in 25-pound bags. The bakery...Ch. 13 - A large law firm uses an average of 40 boxes of...Ch. 13 - Garden Variety Flower Shop uses 750 clay pots a...Ch. 13 - A produce distributor uses 800 packing crates a...Ch. 13 - A manager receives a forecast for next year....Ch. 13 - A food processor uses approximately 27,000 glass...Ch. 13 - The Friendly Sausage Factory (FSF) can produce hot...Ch. 13 - A chemical firm produces sodium bisulfate in...Ch. 13 - A company is about to begin production of a new...Ch. 13 - Prob. 12PCh. 13 - A mail-order house uses 18,000 boxes a year....Ch. 13 - A jewelry firm buys semiprecious stones to make...Ch. 13 - A manufacturer of exercise equipment purchases the...Ch. 13 - A company will begin stocking remote control...Ch. 13 - A manager just received a new price list from a...Ch. 13 - A newspaper publisher uses roughly 800 feet of...Ch. 13 - Given this information: Expected demand during...Ch. 13 - Given this information: Lead-time demand = 600...Ch. 13 - Demand for walnut fudge ice cream at the Sweet...Ch. 13 - The injection molding department of a company uses...Ch. 13 - A company uses 85 circuit boards a day in a...Ch. 13 - One item a computer store sells is supplied by a...Ch. 13 - The manager of a car wash received a revised price...Ch. 13 - A small copy center uses five 500-sheet boxes of...Ch. 13 - Ned's Natural Foods sells unshelled peanuts by the...Ch. 13 - Regional Supermarket is open 360 days per year....Ch. 13 - A service station uses 1,200 cases of oil a year....Ch. 13 - Caring Hospital's dispensary reorders doses of a...Ch. 13 - A drugstore uses fixed-order cycles for many of...Ch. 13 - Prob. 32PCh. 13 - Prob. 33PCh. 13 - Demand for jelly doughnuts on Saturdays at Don's...Ch. 13 - A public utility intends to buy a turbine as part...Ch. 13 - Skinner's Fish Market buys fresh Boston bluefish...Ch. 13 - A small grocery store sells fresh produce, which...Ch. 13 - Demand for devil's food whipped-cream layer cake...Ch. 13 - Prob. 39PCh. 13 - Demand for rug-cleaning machines at Clyde's...Ch. 13 - A manager is going to purchase new processing...Ch. 13 - A Las Vegas supermarket bakery must decide how...Ch. 13 - Offwego Airlines has a daily flight from Chicago...Ch. 13 - UPD Manufacturing produces a range of health care...Ch. 13 - Prob. 1.2CQCh. 13 - Prob. 2.1CQCh. 13 - Grill Rite is an old-line company that started out...Ch. 13 - SARAH LUBBERS AND CHRIS RUSCHE, GRAND VALLEY STATE...Ch. 13 - SARAH LUBBERS AND CHRIS RUSCHE, GRAND VALLEY STATE...Ch. 13 - Prob. 4.3CQCh. 13 - SARAH LUBBERS AND CHRIS RUSCHE, GRAND VALLEY STATE...Ch. 13 - Prob. 4.5CQCh. 13 - Prob. 1OTQCh. 13 - Prob. 2OTQCh. 13 - Prob. 3OTQCh. 13 - Prob. 4OTQ
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- Chris usually sells 120 copies of newspaper each day and believe that sale are normally distributed, with a standard deviation of 15 papers. He pays 70 cents for each paper, which sells $1.25. For each unsold paper, he receives 30-cent credit. a) determine how many papers he should order each day b) calculate the stockout risk for that quantity.arrow_forwardA retailer uses a periodic review order-up-to model to control the inventory of one of its high volume products. Average demand is 2580 units per week with a standard deviation of 1270. The review period is 5 weeks, the lead time is 11 weeks, and the safety factor used is 0.61. How many stockouts should the retailer expect for this product next year?arrow_forwardThe amount of denim used daily by the Southwest ApparelCompany in its manufacturing process to make jeans isnormally distributed with an average of 4000 yards ofdenim and a standard deviation of 600 yards. The lead timerequired to receive an order of denim from the textile mill is a constant 7 days. Determine the safety stock and re-order point if the company wants to limit the probability of a stockout and work stoppage to 5%.arrow_forward
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