Operations Management
17th Edition
ISBN: 9781259142208
Author: CACHON, Gérard, Terwiesch, Christian
Publisher: Mcgraw-hill Education,
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Chapter 14, Problem 19CQ
Summary Introduction
To identify: The main benefit of reducing the lead time.
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Your firm uses a periodic review system for all SKUS classified, using ABC analysis, as B or C
items. Further, it uses a continuous review system for all SKUS classified as A items. The
demand for a specific SKU, currently classified as an A item, has been dropping. You have been
asked to evaluate the impact of moving the item from continuous review to periodic review.
Assume your firm operates 52 weeks per year; the item's current characteristics are:
Demand (D) = 15,080 units/year
Ordering cost (S) = $125.00/order
Holding cost (H) = $3.00/unit/year
Lead time (L) = 5 weeks
Cycle service level = 95 percent
Demand is normally distributed, with a standard deviation of weekly demand of 64 units.
-Calculate the item's EOQ.
- Use the EOQ to define the parameters of an appropriate continuous review and periodie
review system for this item.
-Which system requires more safety stock and by how much?
-How do you think each system can affect your procurement procedures/methods?
Your firm uses a periodic review system for all SKUS classified, using ABC analysis, as B or C
items. Further, it uses a continuous review system for all SKUS classified as A items. The
demand for a specific SKU, currently classified as an A item, has been dropping. You have been
asked to evaluate the impact of moving the item from continuous review to periodic review.
Assume your firm operates 52 weeks per year; the item's current characteristics are:
Demand (D) = 15,080 units/year
Ordering cost (S) = $125.00/order
Holding cost (H) = $3.00/unit/year
Lead time (L) = 5 weeks
Cycle service level = 95 percent
Demand is normally distributed, with a standard deviation of weekly demand of 64 units.
1- How do you think each system can affect your procurement procedures/methods?
1- The number of orders in the inventory system (called A) is total demand (called D) divided
D
by order size per replenishment (called S) or A =". D follows a normal distribution with
a mean of 100,000 and standard deviation of 5000. While S is a continuous uniform
distribution between 20,000 and 30,000. Generate 500 A random number and find the
average.
Chapter 14 Solutions
Operations Management
Ch. 14 - Demand in each period follows the same normal...Ch. 14 - Prob. 2CQCh. 14 - For products with slow-moving demandfor example,...Ch. 14 - Prob. 4CQCh. 14 - Prob. 5CQCh. 14 - Prob. 6CQCh. 14 - Prob. 7CQCh. 14 - Prob. 8CQCh. 14 - If the target in-stock probability increases, then...Ch. 14 - Prob. 10CQ
Ch. 14 - Prob. 11CQCh. 14 - Prob. 12CQCh. 14 - Prob. 13CQCh. 14 - Prob. 14CQCh. 14 - Prob. 15CQCh. 14 - Prob. 16CQCh. 14 - Prob. 17CQCh. 14 - Prob. 18CQCh. 14 - Prob. 19CQCh. 14 - Prob. 1PACh. 14 - Prob. 2PACh. 14 - Prob. 3PACh. 14 - You are the owner of Hotspices.com, an online...Ch. 14 - Prob. 5PACh. 14 - Prob. 6PACh. 14 - Prob. 7PACh. 14 - Prob. 1CCh. 14 - Prob. 2CCh. 14 - Prob. 3CCh. 14 - CASE WARKWORTH FURNITURE1 Warkworth Furniture...Ch. 14 - CASE WARKWORTH FURNITURE1 Warkworth Furniture...
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- Your firm uses a periodic review system for all SKUs classified, using ABC analysis, as B or C items. Further, it uses a continuous review system for all SKUs classified as A items. The demand for a specific SKU, currently classified as an A item, has been dropping. You have been asked to evaluate the impact of moving the item from continuous review to periodic review. Assume your firm operates 52 weeks per year; the item’s current characteristics are:Demand 1D2 = 15,080 units/yearOrdering cost 1S2 = $125.00/orderHolding cost 1H2 = $3.00/unit/yearLead time 1L2 = 5 weeksCycle@service level = 95 percentDemand is normally distributed, with a standard deviation of weekly demand of 64 units.a. Calculate the item’s EOQ.b. Use the EOQ to define the parameters of an appropriate continuous review and periodic review system for this item.c. Which system requires more safety stock and by how much?arrow_forward12. A restaurant uses an average of 8 jars of a special sauce every day. When they place an order, the jars arrive to the restaurant in a day (lead time is 1 day). Daily usage of sauce has a standard deviation of 3 jars. They think their demand during the lead time can be modelled with normal distribution. The manager is willing to accept no more than a 10 percent risk of stockout during lead time. Calculate at which level of inventory a new order needs to be placed (i.e. calculate the reorder-point(ROP)).arrow_forwardAmong the following multi-period inventory models, which one has the highest probability of stockout? A. Fixed Order Quantity with Safety Stock B. Fixed Time Period Model C. Fixed Order Quantity D. Both Fixed Order Quantity & Fixed Order Quantity with Safety Stockarrow_forward
- Which of the following statements is FALSE of a fixed-quantity system (FQS)? Select one: a. In FQS, fixed quantity is ordered to bring the inventory position up to the replenishment level. b. In FQS with uncertain demand, the reorder point is chosen to include the demand during lead time, plus any safety stock. c. In FQS, inventory position is checked continuously, rather than at fixed intervals of time. d. In FQS, orders are placed when the inventory position reaches or drops below the reorder point. e. In FQS with uncertain demand, orders are placed with the same order quantity, but not necessarily with the same periodicity.arrow_forwardA retailer uses the order-up-to model to manage inventory of an item in a store. The leadtime for replenishments is four weeks and it can place orders weekly. Weekly demand isPoisson with mean 0.10 unit. Its order-up-to level is five and unfilled demand is backordered. What is the coefficient of variation of its orders?arrow_forwardA product's demand in cach period follows a Normal distribution with mean of 50 and standard deviation of 6. The order up to level S is 225. Lead time is 3 periods. What is the Expected On hand Inventory? Show all formulas used. calculations and results. What is the stock out probability ? Show all formulas used, calculations and results.arrow_forward
- Oriental Healthcare is a multi-specialty hospital catering to a variety of illnessesconnected to the heart and respiratory systems. The demand for a class of medicalconsumable is generally random. Recently, an examination of the stores records overa period of 10 weeks revealed the following weekly consumption pattern:Week No. Consumption(Units)1 1202 1093 894 1405 1106 1457 778 1209 13010 80The supplier of the item takes on an average 2 weeks to deliver once the order isplaced. Design an appropriate inventory control policy for a periodic review systemfor a review frequency of 4 weeks for a 99% service levelarrow_forwardWhich one of the following variables is not explicitly considered in the computation of the Economic Order Quantity? a. Per unit per year cost of storage and storage insurance for the inventories purchased b. Annual quantity forecasted by the firm that will satisfy the demand of the customers c. Any deductions from the selling price granted by the suppliers to the buyers due to certain quantities reached d. Ordering or transaction cost that must be constant regardless of quantity orderedarrow_forwardIn a periodic order system, the lead time for a box of weed killer is 2 weeks. The review period is 1 week. Demand during the protection interval (i.e. review period +lead time) averages 218 boxes, with a standard deviation of 40 boxes. a.) What is the cycle-service level when the target inventory is set at 300 boxes? b.) In the fall season, demand for weed killer decreases but also becomes more variable. Assume demand during the protection interval is expected to decrease to 180 boxes, but with a standard deviation of 50 boxes. What would be the cycle-service level if management keeps the target inventory level set at 300 boxes? C) if the solution is feasible, should the order quantity changearrow_forward
- An electronics retailer wants to develop an inventory policy to achieve 99% chance of not getting stockouts for a chip. The daily demand for the chip is estimated to be Normal with mean 200 and standard deviation of 20. They count the chip inventory every 2 weeks to place an order, and it takes 11 days for the ordered chips to be delivered. The retailer operates 7 days a week, 365 days a year. They are going to implement an order-up-to model. A) What base stock level should they choose? B) What is the number of chips they would have on order (on average)? C) When they checked their inventory of chips to place a new order, they found that they ran out of stock completely. In addition, they have 10 chips on way to be delivered, while there are five customers who paid for 20 chips in total and are waiting to receive their chips. How many chips should the retailer order?arrow_forwardA small grocery store sells fresh produce, which it obtains from a local farmer. During the strawberry season, demand for fresh strawberries can be reasonably approximated using a normal distribution with a mean of 40 quarts per day and a standard deviation of 6 quarts per day. Excess costsrun 35 cents per quart. The grocer orders 49 quarts per day.a. What is the implied cost of shortage per quart?b. Why might this be a reasonable figure?arrow_forwardThe manager of a local retail store is ordering a specialty item from a supplier in Toronto. The lead time is cons days. The store is open 300 days a year (50 weeks Monday-Saturday, with a two-week vacation). The average. is 40 units, with a standard deviation of 7.6. (Assume that the distribution is approximately normal.) It costs $40 to place an Time left 1:45:28 order, and the annual holding cost is 30% of the inventory value. The supplier charges $8.00 per unit. Find the economic order quantity (EOQ). O a. 1788 O b. 346 O c. 36 Od. 632 The manager of a local retail store is ordering a specialty item from a supplier in Toronto. The lead time is constant at five days. The store is open 300 days a year (50 weeks Monday-Saturday, with a two-week vacation). The average daily demand is 40 units, with a standard deviation of 7.6. (Assume that the distribution is approximately normal) It costs $40 to place an order, and the annual holding cost is 30% of the inventory value. The supplier…arrow_forward
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