Operations Management: Processes and Supply Chains, Student Value Edition Plus MyLab Operations Management with Pearson eText -- Access Card Package (12th Edition)
12th Edition
ISBN: 9780134855424
Author: Lee J. Krajewski, Manoj K. Malhotra, Larry P. Ritzman
Publisher: PEARSON
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Chapter C, Problem 3P
Summary Introduction
Interpretation: The economic production lot size (ELS) should be calculated.
Concept Introduction: Economic production of a lot is the quantity produced at lowest stock value. It is the minimum of total cost that requires for output.
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Sam’s Cat Hotel operates 52 weeks per year, 6 days per week, and uses a continuous review inventory system. It purchases kitty litter for $11.70 per bag. The following information is available about these bags.Demand = 90 bags/weekOrder cost = $54/orderAnnual holding cost = 27 percent of costDesired cycle@service level = 80 percentLead time = 3 weeks 118 working days2Standard deviation of weekly demand = 15 bagsCurrent on-hand inventory is 320 bags, with no open orders or backorders.a. What is the EOQ? What would be the average time between orders (in weeks)?b. What should R be?c. An inventory withdrawal of 10 bags was just made. Is it time to reorder?d. The store currently uses a lot size of 500 bags (i.e., Q = 500). What is the annual holding cost of this policy? Annual ordering cost? Without calculating the EOQ, how can you conclude from these two calculations that the current lot size is too large?e. What would be the annual cost saved by shifting from the 500-bag lot size to the…
Sam’s Cat Hotel operates 52 weeks per year, 7 days per week,and uses a continuous review inventory system. It purchaseskitty litter for $10.75 per bag. The following information isavailable about these bags.Demand = 95 bags>weekOrder cost = $58>orderAnnual holding cost = 25 percent of costDesired cycle@service level = 90 percentLead time = 4 weeks 128 working days2Standard deviation of weekly demand = 16 bagsCurrent on-hand inventory is 315 bags, with no open ordersor backorders.a. What is the EOQ? What would be the average time betweenorders (in weeks)?b. What should R be?c. An inventory withdrawal of 10 bags was just made. Is ittime to reorder?d. The store currently uses a lot size of 490 bags (i.e.,Q = 490). What is the annual holding cost of this policy?Annual ordering cost? Without calculating the EOQ, howcan you conclude from these two calculations that thecurrent lot size is too large?e. What would be the annual cost saved by shifting from the490-bag lot size to the EOQ?
Sam’s Cat Hotel operates 52 weeks per year, 7 days per week,and uses a continuous review inventory system. It purchaseskitty litter for $10.75 per bag. The following information isavailable about these bags.Demand = 95 bags>weekOrder cost = $58>orderAnnual holding cost = 25 percent of costDesired cycle@service level = 90 percentLead time = 4 weeks 128 working days2Standard deviation of weekly demand = 16 bagsCurrent on-hand inventory is 315 bags, with no open ordersor backorders.
a. Suppose that the weekly demand forecast of 95 bags isincorrect and actual demand averages only 65 bags perweek. How much higher will total costs be, owing to thedistorted EOQ caused by this forecast error?b. Suppose that actual demand is 65 bags but that orderingcosts are cut to only $10 by using the Internet to automateorder placing. However, the buyer does not tell anyone,and the EOQ is not adjusted to reflect this reduction in S.How much higher will total costs be, compared to whatthey could be if…
Chapter C Solutions
Operations Management: Processes and Supply Chains, Student Value Edition Plus MyLab Operations Management with Pearson eText -- Access Card Package (12th Edition)
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- Sam's Cat Hotel operates 50 weeks per year, 6 days per week, and uses a continuous review inventory system. It purchases kitty litter for $12.00 per bag. The following information is available about these bags: > Demand = 95 bags/week > Order cost = $50.00/order > Annual holding cost = 20 percent of cost > Desired cycle-service level = 80 percent > Lead time =5 weeks (30 working days) > Standard deviation of weekly demand = 15 bags > Current on-hand inventory is 320 bags, with no open orders or backorders. a. Suppose that the weekly demand forecast of 95 bags is incorrect and actual demand averages only 75 bags per week. How much higher will total costs be, owing to the distorted EOQ caused by this forecast error? The costs will be $ higher owing to the error in EOQ. (Enter your response rounded to two decimal places.)arrow_forwarda) Cycle Inventory b) Total cost c) Reorder level if lead time is constant at 4 daysarrow_forwardCheck my workarrow_forward
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