Operations Management: Processes and Supply Chains (12th Edition) (What's New in Operations Management)
12th Edition
ISBN: 9780134741062
Author: Lee J. Krajewski, Manoj K. Malhotra, Larry P. Ritzman
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 9, Problem 17P
In a continuous review inventory system, the lead time for door knobs is 5 weeks. The standard deviation of demand during the lead time is 85 units. The desired cycle-service level is 99 percent. The supplier of door knobs streamlined its operations and now quotes a 1-week lead time. How much can safety stock be reduced without reducing the 99 percent cycle-service level?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
In a continuous review inventory system, the lead time for door knobs is 5 weeks. The standard deviation of demand during the lead time is 85 units. The desired cycle-service level is 99 percent. The supplier of door knobs streamlined its operations and now quotes a one-week lead time. How much can safety stock be reduced without reducing the 99 percent cycle-service level?
Daily demand for a certain product is normally distributed with a mean of 100 and a standarddeviation of 15. The supplier is reliable and maintains a constant lead time of 5 days.The cost of placing an order is $10 and the cost of holding inventory is $0.50 per unit peryear. There are no stockout costs, and uni lled orders are i lled as soon as the order arrives.Assume sales occur over 360 days of the year.Your goal here is to i nd the order quantity and reorder point to satisfy a 90 percentprobability of not stocking out during the lead time.a. What type of system is the company using?b. Find the order quantity.c. Find the reorder point.
Daily demand for a certain product is normally distributed, with a mean of 100 and a standard deviation of 15. The supplier is reliable and maintains a constant lead time of 5 days. The cost of placing an order is $10 and the cost of holding inventory is $0.50 per unit per year. There are no stock-out costs, and unfilled orders are filled as soon as the order arrives. Assume sales occur over 360 days of the year. Your goal here is to find the order quantity and reorder point to satisfy a 90 percent probability of not stocking out during the lead time.a. What type of system is the company using?b. Find the order quantity.c. Find the reorder point.
Chapter 9 Solutions
Operations Management: Processes and Supply Chains (12th Edition) (What's New in Operations Management)
Ch. 9 - What is the relationship between inventory and the...Ch. 9 - Suppose that a large discount retailer with a lot...Ch. 9 - Will organizations ever get to the point where...Ch. 9 - A part is produced in lots of 1,000 units. It is...Ch. 9 - Prince Electronics, a manufacturer of consumer...Ch. 9 - Terminator, Inc. manufactures a motorcycle part in...Ch. 9 - Ruby-Star Incorporated is considering two...Ch. 9 - Haley Photocopying purchases paper from an...Ch. 9 - Prob. 6PCh. 9 - Southern Markets, Inc. is considering the use of...
Ch. 9 - New Wave Shelving’s inventory manager would like...Ch. 9 - Yellow Press, Inc. buys paper in 1,500-pound rolls...Ch. 9 - Babble, Inc. buys 400 blank cassette tapes per...Ch. 9 - At Dot Com, a large retailer of popular books,...Ch. 9 - Leaky Pipe, a local retailer of plumbing supplies,...Ch. 9 - Sam’s Cat Hotel operates 52 weeks per year, 6...Ch. 9 - Consider again the kitty litter ordering policy...Ch. 9 - In a Q system, the demand rate for strawberry ice...Ch. 9 - Petromax Enterprises uses a continuous review...Ch. 9 - In a continuous review inventory system, the lead...Ch. 9 - In a two-bin inventory system, the demand for...Ch. 9 - You are in charge of inventory control of a highly...Ch. 9 - Your firm uses a continuous review system and...Ch. 9 - A company begins a review of ordering policies for...Ch. 9 - Prob. 22PCh. 9 - The Farmer’s Wife is a country store...Ch. 9 - Prob. 24PCh. 9 - Prob. 25PCh. 9 - Prob. 26PCh. 9 - In a P system, the lead time for a box of...Ch. 9 - Suppose that Sam’s Cat Hotel in Problem 13 uses...Ch. 9 - Your firm uses a periodic review system for all...Ch. 9 - Using the same information as in Problem 21,...Ch. 9 - Wood County Hospital consumes 1,000 boxes of...Ch. 9 - A golf specialty wholesaler operates 50 weeks per...Ch. 9 - What is the EOQ and what is the lowest total cost?Ch. 9 - What is the annual cost of holding inventory at...Ch. 9 - Prob. 3AMECh. 9 - Prob. 4AMECh. 9 - Prob. 5AMECh. 9 - Prob. 6AMECh. 9 - Comment on the sensitivity of the EOQ model to...Ch. 9 - Consider the pressures for small versus large...Ch. 9 - Prob. 2VCCh. 9 - The Marker Maker© product recently experienced an...Ch. 9 - Put yourself in Sue McCaskey’s position and...Ch. 9 - By how much do your recommendations for these two...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, operations-management and related others by exploring similar questions and additional content below.Similar questions
- Enrun Corporation expects to order 140,000 memory chips for inventory during the coming year, and it will use this inventory at a constant rate. Fixed ordering costs are $300 per order; the purchase price per chip is $20; and the firm’s inventory carrying costs is equal to 20 percent of the purchase price. (Assume a 360-day year.) What is the economic ordering quantity for chips? If Enrun holds a safety stock equal to a 30-day supply of chips, what is its average inventory level? Assume that Enrun holds a safety stock equal to a 30-day supply of chips. What is the maximum amount of inventory that Enrun will have on hand at any time, that is, what will be the inventory level right after a delivery is made?arrow_forwardAn electronic store uses continuous review policy to manage the inventory of its high selling monitor model. The monitor has the following characteristics. The annual demand for the monitor is (4000 *2) units per week. The monitors are bought from an offshore supplier at a unit price of 7000 AED per unit and each order costs 80000 AED. The holding cost of laptops is 25% of the value of the product. Calculate the annual demand using the no 2 What is the economic order quantity? EOQ? What would be the average number of orders in a week? What would be the average time between orders (in weeks)? What would be the average inventory level? The electronic store is considering a local supplier. The ordering cost of the new supplier is 65000 AED however the unit price of the monitor is 9000 AED. Should the electronic store change its supplier?arrow_forwardItems purchased from a vendor cost $250 each, and the forecast for next year’s demand is 2,000 units. The optimal order size is 100. The firm operates 52 weeks next year and lead time is 3 weeks. It costs $5 every time an order is placed for more units, and the storage cost is $2 per unit per year. What is the total ordering cost for a year? a.100 b.50 c.250 d.500 e.300arrow_forward
- A warehouse checks inventory and places an order from a supplier for a particular product once a month. The monthly demand for the product is independent and normally distributed with a mean of 500 and a standard deviation of 100. If the warehouse targets a 90% service level for this product, and the supplier’s lead time is one month, how much safety stock should be held? PLEASE SHOW CALCULATIONS/EXCEL WITH FORMULASarrow_forwardPetromax Enterprises uses a continuous review policy to manage the inventory for one of its SKUs. The following information is available on the item. The firm operates 50 weeks in a year. Demand = 90,000 units/year Ordering Cost = $60/Order Holding Cost = $3/Unit/Order Lead Time = 10 weeks Standard Deviation of Weekly Demand = 200 units Suppose due to some recent changes to the target service level, they have determined the reorder point to be 20,000. If the inventory position of this SKU is currently 19,600, how many units should they order? (Round your answer to the nearest whole number, if it has decimals. Input 0 if they should not order now.)arrow_forwardDemand for your product averages 20 units per day, with a standard deviation of 4. Your lead time is 5 days. What should your reorder point be, if you want to have a 95% chance of not running out of products during the lead time? With this reorder level, how much safety stock do you have?arrow_forward
- Suppose that the R&B Beverage Company has a soft drink product that shows a constant annual demand rate of 3,800 cases. A case of the soft drink costs R&B $3. Ordering costs are $20 per order and holding costs are 25% of the value of the inventory. R&B has 250 working days per year, and the lead time is 5 days. Identify the following aspects of the inventory policy. a. economic order quantity (round your answer to the nearest integer.) _____450_______ b. reorder point ______76______ c. cycle time (in days) (round your answer to two decimal places.) ______29.61______ d. total annual cost (in $) (round your answer to two decimal places.) _____?_______ ***I am asking the question with the ? symbol. I have been able to locate the numbers for the first three but I am having issues computing my answers for the last one.arrow_forwardGiven the following information, formulate an inventory management system. The item is demanded 50 weeks a year. Item cost $ 8.00 Standard deviation of weekly demand 25 per week Order cost $ 298.00 Lead time 4 weeks Annual holding cost (%) 29 % of item cost Service probability 98 % Annual demand 28,100 Average demand 562 per week a. Determine the order quantity and reorder point. (Use Excel's NORMSINV() function to find the correct critical value for the given α-level. Do not round intermediate calculations. Round "z" value to 2 decimal places and final answer to the nearest whole number.) Optimal order quantity units Reorder point units b. Determine the annual holding and order costs. (Round your answers to 2 decimal places.) Holding cost $ Ordering cost $ c. Assume a price break of $50 per order was offered for purchase quantities of 2,100 or more units per order. If…arrow_forwardThe demand for a commodity is 40,000 units a year, at a steady rate. It costs $20 to place an order, and $0.40 to hold a unit for a year. Find the order size to minimize inventory costs, the number of orders placed each year, the length of the inventory cycle and the total costs of holding inventory for the year. What is the EOQ? What is the number of orders placed each year? What is the inventory cycle (length of time that the the order size will last)? in terms of weeks What is the total ordering & carrying costs at the EOQ level?arrow_forward
- An electronics retailer carries a particular cellular telephone with the following characteristics:Average monthly sales = 120 unitsOrdering cost = $25 per orderCarrying cost = 35 percent per yearItem cost = $300 per unitLead time = 4 daysStandard deviation of daily demand = .2 unitWorking days per year = 250a. Determine the EOQ.b. Calculate the reorder point for a 92 percent service level, assuming normally distributed demand.c. Design a Q system for this item.d. What happens to the reorder point when the lead time changes? What happens to the reorder point when the standard deviation of demand changes?arrow_forwardSuppose that the R&B Beverage Company has a soft drink product that shows a constant annual demand rate of 3,700 cases. A case of the soft drink costs R&B $4. Ordering costs are $20 per order and holding costs are 23% of the value of the inventory. R&B has 250 working days per year, and the lead time is 5 days. Identify the following aspects of the inventory policyarrow_forwardCompany XYZ makes bicycles. XYZ produces 400 bicycles a month. They must buy tires from a supplier at a cost of $20 per tire. The inventory holding cost rate is 15% and ordering costs $50 per order. Part i) Let’s assume that there is no shortage inventory allowed. Calculate optimal annual order quantity Calculate annual total inventory cost ^already have the answer for this one. Just input the whole question so it would make more sense. Part ii) Let’s assume that shortage inventory is allowed. With that being said, we know that the shortage cost per unit of item is $5 per year. <<this is the one that I am stuck on. Calculate optimal annual order quantity Calculate annual total inventory cost Hint: Each bicycle has two tires.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Purchasing and Supply Chain ManagementOperations ManagementISBN:9781285869681Author:Robert M. Monczka, Robert B. Handfield, Larry C. Giunipero, James L. PattersonPublisher:Cengage Learning
Purchasing and Supply Chain Management
Operations Management
ISBN:9781285869681
Author:Robert M. Monczka, Robert B. Handfield, Larry C. Giunipero, James L. Patterson
Publisher:Cengage Learning
Inventory Management | Concepts, Examples and Solved Problems; Author: Dr. Bharatendra Rai;https://www.youtube.com/watch?v=2n9NLZTIlz8;License: Standard YouTube License, CC-BY