MyLab Operations Management with Pearson eText -- Access Card -- for Operations Management: Processes and Supply Chains
12th Edition
ISBN: 9780134742366
Author: Lee J. Krajewski, Manoj K. Malhotra, Larry P. Ritzman
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
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 solution
Students have asked these similar questions
A 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)
SAFETY STOCK WITH PROBABILISTIC DEMAND
Memphis Regional Hospital stocks a “code blue” resuscitation kit that has a normally distributeddemand during the reorder period. The mean (average) demand during the reorder period is 350 kits,and the standard deviation is 10 kits. The hospital administrator wants to follow a policy that results instockouts only 5% of the time.(a) What is the appropriate value of Z ? (b) How much safety stock should the hospital maintain?(c) What reorder point should be used?APPROACH c The hospital determines how much inventory is needed to meet the demand 95% of thetime. The figure in this example may help you visualize the approach. The data are as follows:m = Mean demand = 350 kitssdLT = Standard deviation of demand during lead time = 10 kitsZ = Number of standard normal deviations
Fisk 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?
LA
Chapter 9 Solutions
MyLab Operations Management with Pearson eText -- Access Card -- for Operations Management: Processes and Supply Chains
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
- Maroons Medical Supplies, Inc. must order masks from its supplier in lots of 1 dozen boxes. Given the information provided below, complete the following table: Annual demand 26,000 dozen Cost per order placed P30 Carrying cost 20% Price per dozen P7.80 Order Size (Dozen) 250 500 1,000 2,000 13,000 26,000 Number of orders Average inventory Carrying cost Order cost Total cost 1. What is the EOQ? Please include/fill the table and solve for EOQ. Thank you so much!arrow_forwardRomulo Drugstore sells 10 bottles of Paracetamol syrup Strawberry flavor 60 mL a day, and 15 bottles on holidays and weekends. It takes 5 days for the supplier to deliver the order; and on peak seasons and certain occasions, the supplier takes 10 days to deliver the ordered items. What should be the safety stock level of the said item? 20 bottles 25 bottles 100 bottles 175 bottlesarrow_forwardErgonomics Inc. sells ergonomically designed office chairs. The company has the following information: Average demand = 36 units per day Average lead time = 50 days Item unit cost = $70 for orders of less than 400 units Item unit cost = $68 for orders of 400 units or more Ordering cost = $45 Inventory carrying cost = 25% The business year is 250 days Assume there is no uncertainty at all about the demand or the lead time. Calculate EOQ if unit cost is $70 and $68. (Note: These EOQs do not need to be feasible in theirprice range.) (Round up your answers to the next whole number.) EOQ Unit cost at $70 units Unit cost at $68 units Calculate annual ordering costs for each alternative? (For the first value, use your rounded EOQ from Part a. For the second value, use the lowest feasible order quantity needed to qualify for that price level. Round your answers to 2 decimal places.) Annual Ordering Cost Unit cost at $70 Unit…arrow_forward
- Fisk Corporation is trying to improve its inventory control system and has installed an online computer at its retail stores. Fisk anticipates sales of 97,200 units per year, an ordering cost of $4 per order, and carrying costs of $1.50 per unit. What is the economic ordering quantity? How many orders will be placed during the year? What will the average inventory be? What is the total cost of ordering and carrying inventory?arrow_forwardPeter Sagan is in charge of maintaining hospital supplies at Champs Hospital. During the past year the mean weekly demand for a special type of tubing was 186 packages of this tubing with a standard deviation of 13 packages of tubing. The lead time for receiving this tubing from the supplier is 1.5 weeks. Peter would like to maintain a 95% service level and places an order for 750 packages every time an order is placed. a) How much safety stock should be used for a 95% service level? b) If the weekly demand is 186 and there is a 1.5 week lead time - what is the reorder point (95% service level)? c) How much safety stock should be used for a 99% service level? solve using excelarrow_forwardAs the Manager of Branson’s Department Store, you are responsible for ensuring that reorder quantities for the various items have been correctly established. You decide to test one item and choose product Z. A continuous review inventory policy has been used, so you examine this as well as other records and come up with the following data: Cost per unit $35 Holding cost 20 percent of unit cost Average daily demand 10 units Ordering cost $30 per order Standard deviation of daily demand 3 units Delivery lead time 4 days Because customers generally do not wait but go elsewhere, you decide on a service probability of 90 percent. Assume that Branson’s Department Store operates 320 days per year. [What is the annual demand (D)? Determine the optimal order quantity, Q*. Determine the reorder point (R) if demand is constant. Determine the reorder point (R) if demand is varies.arrow_forward
- Based on available information, lead time demand for PC thumb drives averages 51 units (normally distributed), with a standard deviation of 5 drives. Management wants a 98% service level. Refer to the standard normal table for z-values. a) What value of Z should be applied? b) How many drives should be carried as safety stock? units (round your response to the nearest whole number). c) What is the appropriate reorder point? units (round your response to the nearest whole number).arrow_forwardDaily 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?arrow_forwardA spice retailer has a lead time of 4 weeks from its supplier of a particular item and the retailer orders every week. Average weekly demand is normally distributed with a mean of 40 units and standard deviation of 30 units. a) If it uses an order-up-to level of 301 units, what is its expected ON-HAND inventory? b) If it uses an order-up-to level of 250 units, what is its expected ON-ORDER inventory? c) If it uses an order-up-to-level of 368 units, what is its in-stock probability? d) For a .96 in-stock probability, what should its order=up-to level be?arrow_forward
- During the last 5 weeks, demands for a certain SKU at a retailer were 7 units (5 weeks ago), 4 units, 4 units, 4 units, and 5 units (last week). The retailer uses a period review model with order-up-to level 71 units, a review period of 2 weeks, and the lead time is 11 weeks. It is time to order. How much should the retailer order?arrow_forwardDaily demand for a product is 120 units, with a standard deviation of 30 units. The review period is 14 days and the lead time is 7 days. At the time of review, 130 units are in stock. If only a 1 percent risk of stocking out is acceptable, how many units should be ordered?arrow_forwardA 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_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Practical Management ScienceOperations ManagementISBN:9781337406659Author:WINSTON, Wayne L.Publisher:Cengage,
Operations ManagementOperations ManagementISBN:9781259667473Author:William J StevensonPublisher:McGraw-Hill Education
Operations and Supply Chain Management (Mcgraw-hi...Operations ManagementISBN:9781259666100Author:F. Robert Jacobs, Richard B ChasePublisher:McGraw-Hill Education
Purchasing and Supply Chain ManagementOperations ManagementISBN:9781285869681Author:Robert M. Monczka, Robert B. Handfield, Larry C. Giunipero, James L. PattersonPublisher:Cengage Learning
Production and Operations Analysis, Seventh Editi...Operations ManagementISBN:9781478623069Author:Steven Nahmias, Tava Lennon OlsenPublisher:Waveland Press, Inc.
Practical Management Science
Operations Management
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:Cengage,
Operations Management
Operations Management
ISBN:9781259667473
Author:William J Stevenson
Publisher:McGraw-Hill Education
Operations and Supply Chain Management (Mcgraw-hi...
Operations Management
ISBN:9781259666100
Author:F. Robert Jacobs, Richard B Chase
Publisher:McGraw-Hill Education
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
Production and Operations Analysis, Seventh Editi...
Operations Management
ISBN:9781478623069
Author:Steven Nahmias, Tava Lennon Olsen
Publisher:Waveland Press, Inc.
Inventory Management | Concepts, Examples and Solved Problems; Author: Dr. Bharatendra Rai;https://www.youtube.com/watch?v=2n9NLZTIlz8;License: Standard YouTube License, CC-BY