Operations Management: Processes and Supply Chains (11th Edition)
11th Edition
ISBN: 9780133872132
Author: Lee J. Krajewski, Manoj K. Malhotra, Larry P. Ritzman
Publisher: PEARSON
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Textbook Question
Chapter 9, Problem 28P
Suppose that Sam’s Cat Hotel in Problem 13 uses a P system instead of a Q system. The average daily demand is
- What P (in working (lays) and T should be used to approximate the cost tradeoffs of the EOQ?
- How much more safety stock is needed than with a Q system?
- It is time for the periodic review. How much kitty litter should be ordered?
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Peter 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.
d) If the weekly demand is 186 and there is a 1.5 week lead time - what is the reorder point (99%
service level)?
e) If the carrying cost per year is $0.50/unit/year - what is the additional cost associate with the
99% service level compared to 95% service level (i.e. cost of safety stock at 99% level - cost of
safety stock at 95% service level)?
solve on excel
Peter 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.
d) If the weekly demand is 186 and there is a 1.5 week lead time - what is the reorder point (99%
service level)?
e) If the carrying cost per year is $0.50/unit/year - what is the additional cost associate with the
99% service level compared to 95% service level (i.e. cost of safety stock at 99% level - cost of
safety stock at 95% service level)?
If the company in #8 uses exponential smoothing (smoothing factor = .6) and the forecast for the year is the figure they use for EOQ calculations, calculate the EOQ using the following information:
The cost of ordering and carrying cost % are the same as #7
Cost of ordering: $25
Carrying costs: 45%
Starting with 2018, Forecast the 2020 demand using exponential smoothing and then use that forecast as the annual demand.
year
sales
2017
1,000,000
2018
1,200,000
2019
2,000,000
2020
Chapter 9 Solutions
Operations Management: Processes and Supply Chains (11th Edition)
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 - Prob. 1CCh. 9 - Prob. 2C
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- Peter 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_forwardH & K Electronic Warehouse sells a 12-pack of AAA batteries, and this is a very popular item. Demand for this is normally distributed, with an average of 50 packs per day and a standard deviation of 16. The average delivery time is 5 days, with a standard deviation of 2 days. Delivery time has been found to be normally distributed. A 96% service level is desired. What is the standard deviation of demand during the lead time? How much safety stock should be carried, and what should be the reorder pointarrow_forwardWhy do we use "Specifications or bill of material" in the dependent inventory model?arrow_forward
- Micro-Electronics Warehouse Headset and Webcam Sale Item Type Reg. Price After Savings Price BuddyChat 200 Headset $34.72 $24.40 BuddyChat 300 Headset $41.27 $34.91 BuddyCam HD Webcam $83.54 $61.46 You have decided to purchase the headset with the greatest markdown percent and the BuddyCam HD webcam in order to take advantage of an "Extra $15 Rebate" offer when you purchase both. What is the markdown percent on your total purchase including the rebate?arrow_forwardWhy do the basic EOQ model variations not include theprice of an item?arrow_forwardMaroons 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_forward
- 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) $44/order Standard deviation of weekly demand (sd) 15 tablets Lead time (L) 2 weeks Desired cycle service level 95% If the pharmacist uses the continuous review (Q) system to control the inventory of the drug, what would be the order quantity and reorder point? If the pharmacist uses the periodic review (P) system to control the inventory of the drug, what would be the review interval and target inventory level? (Hint: Use the EOQ model to derive the review interval P)arrow_forwardDescribe the 3 differences between a fixed-quantity (Q) and a fixed-period (P) inventory ns4 a. system? Fixed Quality Inventory Fixed Period Inventoryarrow_forwardThe company L. Houts Plastics is a large manufacturer of injection- molded plastics in North Carolina. An investigation of the company's manufacturing facility in Charlotte yields the information presented in the table below. How would the plant classify these items to an ABC classification system? L. Houts Plastics Charlotte Inventory Levels Item Code # Average Inventory (units) Value ($/unit) 3.75 4.00 2.50 1.50 1.75 2.00 1289 2347 400 300 120 2349 2363 2394 2395 6782 75 60 30 20 1.15 2.05 12 7844 8210 8310 1.80 2.00 3.00 9111 6.arrow_forward
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