Practical Operations Management
2nd Edition
ISBN: 9781939297136
Author: Simpson
Publisher: HERCHER PUBLISHING,INCORPORATED
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Chapter 10, Problem 21P
Summary Introduction
Interpretation: Most appropriate reorder point for carpet cleaning firm is to be calculated.
Concept Introduction: Reorder point is the minimum level of inventory or stock which indicates a firm to restock its inventory. It is an indicator for a firm to restore its stock.
Stock out risk is the risk of having no item in the inventory when demand increases.
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Daily demand for product sample kits is normally distributed with a mean of 35 units and a standard deviation of 4. Supply is virtually certain with a lead time of 9 days. The cost of placing an order is $20, and annual carrying costs for one kit is 25 percent. The price of one kit is $12.50. Assume a year has 365 days.If a 99% service level is desired, what is average inventory on hand?
If demand had no variation, what would the reorder point be?
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.)
Chapter 10 Solutions
Practical Operations Management
Ch. 10 - Prob. 1DQCh. 10 - Prob. 2DQCh. 10 - Prob. 3DQCh. 10 - Prob. 4DQCh. 10 - Prob. 5DQCh. 10 - Prob. 6DQCh. 10 - Prob. 1PCh. 10 - Prob. 2PCh. 10 - Prob. 3PCh. 10 - Prob. 4P
Ch. 10 - Prob. 5PCh. 10 - Prob. 6PCh. 10 - Prob. 7PCh. 10 - Prob. 8PCh. 10 - Prob. 9PCh. 10 - Prob. 10PCh. 10 - Prob. 11PCh. 10 - Prob. 12PCh. 10 - Prob. 13PCh. 10 - Prob. 14PCh. 10 - Prob. 15PCh. 10 - Prob. 16PCh. 10 - Prob. 17PCh. 10 - Prob. 18PCh. 10 - Prob. 19PCh. 10 - Prob. 20PCh. 10 - Prob. 21PCh. 10 - Prob. 22PCh. 10 - Prob. 23PCh. 10 - Prob. 24PCh. 10 - Prob. 25PCh. 10 - Prob. 26PCh. 10 - Prob. 27PCh. 10 - Prob. 28PCh. 10 - Prob. 29PCh. 10 - Prob. 30PCh. 10 - Prob. 31PCh. 10 - Prob. 2.1QCh. 10 - Prob. 2.2QCh. 10 - Prob. 2.3QCh. 10 - Prob. 2.4QCh. 10 - Prob. 3.1QCh. 10 - Prob. 3.2QCh. 10 - Prob. 3.3QCh. 10 - Prob. 3.4Q
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- Please do not give solution in image format thankuarrow_forwardA company is targeting a cycle service level of 25%. What should their reorder point be if they have an average weekly demand of 100, a weekly demand standard deviation of 20, and a lead time of 5 weeks?arrow_forwardA subcontracting firm Gamma Pharmaceuticals Ltd. located in Western India dealing with generic medicines operates 50 weeks per year. The following information is available regarding the major ingredient used for the medicine:Weekly Demand= 60 unitsStandard deviation of weekly demand = 9 unitsOrdering costs (Co) = Rs. 64/ orderHolding costs (Ch) = Rs.40/unit/yearCycle-service level = 90% (z-value = 1.28)Lead time = 2 weeksNumber of weeks per year = 50 weeksd) Using the fixed order quantity system to control inventory, calculate the EOQe) Compute the reorder point and state the order decision rulef) Compute the total variable cost of inventory.arrow_forward
- SKU One is sold at retail store for $8 per unit. SKU One has a weekly demand of 975 units with an average lead time of 5 weeks and a standard deviation of lead time of 2 weeks. Based on the information and a 95% service level, what is the reorder point for SKU One? please show work how to solvearrow_forwardYour company is streamlining its inventory management systems and has evaluated its inventory purchasing using the Economic Order Quantity (EOQ) model. 75,000 units are used annually. Each unit costs $50. The order cost (per order) is $180 and the carrying cost per item per year is $40. On the basis of this information it is recommended that the EOQ is 822 units per order. Unfortunately the supplier of inventory has a minimum order quantity of 2,000 units. How much more will it cost your company each year in total because of this supplier requirement? Show your workings.arrow_forwardConsider a continuous review inventory system. Demand is normally distributed with an average of 28,000 per month and a monthly standard deviation of 5000 units. LEad time is three weeks (assume four weeks per month). If the firm desires only an 87% cycle service level, how many unitts of safety stock should be held?arrow_forward
- A sporting goods company has a distribution center that maintains inventory of fishing rods. The fishing rods have the following demand, lead time, and cost characteristics: Average demand = 130 units per day, with a standard deviation of 12 units Average lead time = 12 days with a standard deviation of 1 day 250 days per year in the business year Unit cost = $28 Desired service level = 97.5% Ordering cost $53 Inventory carrying cost = 25% a. What is the standard deviation of demand during lead time? b. How many fishing rods should the distribution center carry to provide the desired service level? c. What is the EOQ? d. What is the average cycle stock?arrow_forwardSam's Pet Hotel operates 52 weeks per year, 6 days per week, and uses a continuous review inventory system. It purchases kitty litter for $13.00 per bag. The following information is available about these bags: ≻Demand=75 bags/week ≻Order cost=$55.00/order ≻Annual holding cost=25 percent of cost ≻Desired cycle-service level=80 percent ≻Lead time=4 weeks (24 working days) ≻Standard deviation of weekly demand=15 bags ≻Current on-hand inventory is 320 bags, with no open orders or backorders. Part 2 a. Suppose that the weekly demand forecast of 75 bags is incorrect and actual demand averages only 50 bags per week. How much higher will total costs be, owing to the distorted EOQ caused by this forecast error? The costs will be $enter your response here higher owing to the error in EOQ. (Enter your response rounded to two decimal places.) a. What is the EOQ? What would the average time between orders (in weeks)? b. What should R be? c. An inventory withdraw…arrow_forwardA pharmacist is trying to determine the inventory order and stock levels for a particular drug. The following information is available about the drug. Demand (D) 85 tablets/week Working weeks per year 52 weeks Unit holding cost per year (H) $6 Order cost (S) $44/order Standard deviation of weekly demand (sd) 15 tablets Lead time (L) 2 weeks Desired cycle service level 95% If the pharmacist uses the continuous review (Q) system to control the inventory of the drug, what would be the order quantity and reorder point? If the pharmacist uses the periodic review (P) system to control the inventory of the drug, what would be the review interval and target inventory level? (Hint: Use the EOQ model to derive the review interval P)arrow_forward
- The average expense of keeping inventory for an integrated circuit producer is 48 percent.What inventory keeping expense (in $) does an object cost $300 and has an estimated one-month inventory supply?arrow_forwardFisk Corporation is trying to improve its inventory control system and has installed an online system at its retail stores. Fisk anticipates sales of 58,800 units per year, an ordering cost of $4 per order, and carrying costs of $1.50 per unit. In the second year, Fisk Corporation finds that it can reduce ordering costs to $1 per order, but carrying costs will stay the same at $1.50 per unit. a-1. What is the economic ordering quantity for the second year? Economic ordering quantity (EOQ) a-2. How many orders will be placed during the second year? Number of orders a-3. What will the average inventory be for the second year? Average inventory Total costs units units a-4. What is the total cost of ordering and carrying inventory for second year? LAarrow_forwardThe production order quantity for this problem is approximately 332 units. daily demand rate = 64; daily production rate = 100. What is the average inventory on - hand ( in other words - the inventory for which you are paying Holding Costs ) In this problem ?arrow_forward
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