Operations Management
13th Edition
ISBN: 9781259667473
Author: William J Stevenson
Publisher: McGraw-Hill Education
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Chapter 13, Problem 27P
Ned's Natural Foods sells unshelled peanuts by the pound. Historically, Ned has observed that daily demand is
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Ned’s Natural Foods sells unshelled peanuts by the pound. Historically, Ned has observed thatdaily demand is normally distributed with a mean of 80 pounds and a standard deviation of 10pounds. Lead time also appears normally distributed with a mean of eight days and a standarddeviation of one day. What ROP would provide a stockout risk of 10 percent during lead time?
Annual demand is 16000 units, cost per order is $75 and carrying cost per unit as a percentage is 10%. The company works 250 weeks a year; the lead-time on all orders placed is 6 working days.
Assuming constant lead-time demand, and a unit cost of $45 what is the economic order quantity? What is the reorder point.
If lead-time demand shows variability that follows a normal distribution with a mean μ =420 and a standard deviation σ =20, what will the revised reorder point if two stock-outs (shortages) are allowed?
What is the company’s reorder point if the probability of a stock-out on any cycle is restricted to 0.05?
Suppose that the retailer SnowInc buys ski jackets from the Chinese manufacturerJacketCo. Due to the short selling season and long delivery lead time for this fashiongood, this is a one-time purchase decision. SnowInc estimates the season’s demand forone type of jacket to be normally distributed with mean 500 and standard deviation 100.Retail price for the jacket is $100. If not sold at the end of the season they unload themfor $10 per jacket. The wholesale price JacketCo charges is $30 per jacket and JacketCo’sper unit manufacturing cost is $12. How many jackets should SnowInc order and what arethe two firms’ profits? If both firms were owned by the same company, how would theseanswers change?
Chapter 13 Solutions
Operations Management
Ch. 13 - What are the primary reasons for holding...Ch. 13 - What are the requirements for effective inventory...Ch. 13 - Briefly describe each of the costs associated with...Ch. 13 - What potential benefits and risks do RFID tags...Ch. 13 - Prob. 5DRQCh. 13 - Prob. 6DRQCh. 13 - a. List the major assumptions of the EOQ model. b....Ch. 13 - Explain briefly how a higher carrying cost can...Ch. 13 - What is safety stock, and what is its purpose?Ch. 13 - Prob. 10DRQ
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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- 3arrow_forwardThat One Book sells its books through The Witch and the Wardrobe bookstores. It costs That One Book $0.80 to print each book; it sells the book to The Witch and the Wardrobe for $2.50. The Witch and the Wardrobe then sells the books at retail for $6.00. Whatever doesn’t sell gets thrown away. Demand for the book each issue is normal with a mean of 5219 and a standard deviation of 1610. To give The Witch and the Wardrobe incentive to order more books, it proposes a revenue-sharing contract. Instead of selling the book to The Witch and the Wardrobe for $2.50, That One Book will sell its books to The Witch and the Wardrobe for only $1.00. However, for each book that The Witch and the Wardrobe sells at retail, The Witch and the Wardrobe must give $2.00 back to That One Book. With this revenue sharing agreement in place, what is the optimal order amount that will maximize The Witch and the Wardrobe expected profit? Please do fast ASAParrow_forwardPlease answer questions 9 and 10 based on this data. Daily demand for packages of five videotapes at a warehouse store is found to be normally distributed with a mean of 50 and a standard deviation of 5. When the store orders more tapes, the orders take four days to arrive. Assume the store is open 360 days a year. If the store wants the probability of stocking out to be no more than 5%, and demand each day is independent of the day before, what should be the safety stock? Please round your answer to two decimals. Safety stock= 17 Question 10 4 pts If the store wants the probability of stocking out to be no more than 5%, and demand each day is independent of the day before, what reorder point should be set? Please round your answer to two decimals. Reorder point=arrow_forward
- 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?arrow_forwardThe Corner Drug Store fills prescriptions for a popular children’s antibiotic, amoxicillin. The daily demand for amoxicillin is normally distributed, with a mean of 200 ounces and a standard deviation of 80 ounces. The vendor for the pharmaceutical firm that supplies the drug calls the drugstore pharmacist every 30 days to check the inventory of amoxicillin. During a call, the druggist indicated that the store had 60 ounces of the antibiotic in stock. The lead time to receive an order is 4 days. Determine the order size that will enable the drugstore to maintain a 95% service level.arrow_forwardHow do I do questoin 14?arrow_forward
- Suppose the demand of a product in a retail store is 800 per year and it occurs at a constant rate. Placement of an order of this product to an outside supplier by the store is 40 Dollar. The super market authority has calculated the inventory holding cost per unit per year as 90 cents. Assuming no occurrence of shortages of the product, find i. the minimal number of orders per year. Explain whether the nearest integer number of orders per year is justified. Please answer this part with the explanation part asked in the question.arrow_forward3. Daily demand for tablets of amazon is normally distributed, with a mean of 100 and standard deviation of 30. The tablet supplier takes an average of 15 days to replenish inventory at Amazon. The standard deviation of the supplier lead time is 5 days. Amazon follows a "periodic review policy" with a review period of 30 days. Amazon is targeting a CSL of 98% for its tablet inventory. (a) What is the mean demand during lead time and review period? What is the standard deviation of demand during lead time and review period? (c) What is the safety (b) stock (in units) during lead time and review period?arrow_forwardTeddy Bower is an outdoor clothing and accessories chain that purchases a line of parkas at $10 each from its Asian supplier, TeddySports. Unfortunately, at the time of the order placement, demand is still uncertain: Teddy Bower forecasts that its demand is normally distributed with a mean of 1800 and a standard deviation of 1000. Teddy Bower sells these parkas at $22 each. Unsold parkas have little salvage value; Teddy Bower simply gives them away to a charity (and also doesn't collect a tax benefit for the donation). How many parkas should Teddy Bower buy from TeddySports to maximize expected profit? (please use the normal distribution table and round up to the nearest integer).arrow_forward
- I will upvote if solved correctlyarrow_forwardThe Fast Service Food Mart stocks frozen pizzas in a refrigerated display case. The average daily demand for the pizzas is normally distributed, with a mean of 8 pizzas and a standard deviation of 2.5 pizzas. A vendor for a packaged food distributor checks the market’s inventory of frozen foods every 10 days, and during a particular visit, there were no pizzas in stock. The lead time to receive an order is 3 days. Determine the order size for this order period that will result in a 99% service level. During the vendor’s following visit, there were 5 frozen pizzas in stock. What is the order size for the next order period?arrow_forwardHarvey Gold, orders an unusual olive from the island of Santorini, off the Greek coast. Over the years he has noticed considerable variability in the time it takes to receive orders of these olives. He can place a replenishment order at any time. On average the order lead time is 4 months and the standard deviation is 6 weeks (1.5 months). The monthly demand for olives is normally distributed with a mean of 15 jars and a standard deviation of 6. The fixed ordering cost =$500, the cost of a jar to Harvey is $10 a jar, and the annual inventory holding cost is 18% of the product's cost ($10 per jar). Assume 4 weeks each month and 90% service level. Find the reorder point s, amount of safety stock, order-up-to level S, average inventory level, and the annual inventory-related cost. Table of Z-values for normal distribution: Service level Z-value 90% 1.29 91% 92% 93% 94% | 95% 96% 97% 98% 99% 1.65 1.34 1.41 1.48 1.56 1.75 1.88 2.05 2.33arrow_forward
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