Production and Operations Analysis, Seventh Edition
7th Edition
ISBN: 9781478623069
Author: Steven Nahmias, Tava Lennon Olsen
Publisher: Waveland Press, Inc.
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Chapter 13.6, Problem 22P
Summary Introduction
Interpretation:
The general replacement age
Concept Introduction:
The objective of optimal policy is to determine the value of ‘t’that minimizes the total cost of maintenance and replacement over an infinite horizon. A replacement cycle is the time between successive replacements.
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Consider the nonlinear optimization model stated below.
Min 2x²-18x + 2XY + y² 14Y + 51
s.t.
X + 4Y ≤7
(a) Find the minimum solution to this problem.
at (X, Y) =
(b) If the right-hand side of the constraint is increased from 7 to 8, how much do you expect the objective function to change?
Based on the dual value on the constraint X + 4Y ≤7, we expect the optimal objective function value to decrease by
(c) Resolve the problem with a new right-hand side of the constraint of 8. How does the actual change compare with your estimate?
If we resolve the problem with a new right-hand-side of 8 the new optimal objective function value is
, so the actual change is a decrease of
rather than what we expected in part (b).
Burger Dome sells hamburgers, cheeseburgers, french fries, soft drinks, and milk shakes, as well as a limited number of specialty items and dessert selections. Although Burger Dome would like to serve each customer immediately, at times more customers arrive than
can be handled by the Burger Dome food service staff. Thus, customers wait in line to place and receive their orders.
Burger Dome analyzed data on customer arrivals and concluded that the arrival rate is 40 customers per hour. Burger Dome also studied the order-filling process and found that a single employee can process an average of 56 customer orders per hour. Burger Dome is
concerned that the methods currently used to serve customers are resulting in excessive waiting times and a possible loss of sales. Management wants to conduct a waiting line study to help determine the best approach to reduce waiting times and improve service.
Suppose Burger Dome establishes two servers but arranges the restaurant layout so that an…
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Chapter 12 Homework: Managing Inventories in Supply Chains
Assignment: Chapter 12 Homework: Managing Inventories in Supply Chains
Questions Problem 12-70 Algo (Managing Fixed-Quantity Inventory Systems)
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Spreadsheet
Environmental considerations, material losses, and waste disposal can be included in the EOQ model to improve inventory-management decisions. Assume that the annual demand for an
industrial chemical is 1,600 lb, item cost is $2/lb, order cost is $45, inventory holding cost rate (percent of item cost) is 15 percent. Use the EOQ Model Excel template in MindTap to
answer the following:
a. Find the EOQ and total cost, assuming no waste disposal. Do not round intermediate calculations. Round your answer for the EOQ to…
Chapter 13 Solutions
Production and Operations Analysis, Seventh Edition
Ch. 13.1 - Prob. 3PCh. 13.1 - Prob. 4PCh. 13.1 - Prob. 5PCh. 13.1 - Prob. 6PCh. 13.2 - Prob. 7PCh. 13.2 - Prob. 9PCh. 13.3 - Prob. 13PCh. 13.3 - Prob. 14PCh. 13.4 - Prob. 15PCh. 13.4 - Prob. 16P
Ch. 13.4 - Prob. 17PCh. 13.4 - Prob. 18PCh. 13.4 - Prob. 19PCh. 13.4 - Prob. 20PCh. 13.6 - Prob. 21PCh. 13.6 - Prob. 22PCh. 13.6 - Prob. 23PCh. 13.6 - Prob. 24PCh. 13.6 - Prob. 25PCh. 13.7 - Prob. 26PCh. 13.7 - Prob. 27PCh. 13.7 - Prob. 28PCh. 13.7 - Prob. 30PCh. 13.7 - Prob. 31PCh. 13.7 - Prob. 32PCh. 13.7 - Prob. 33PCh. 13.7 - Prob. 34PCh. 13.8 - Prob. 35PCh. 13.8 - Prob. 36PCh. 13.8 - Prob. 37PCh. 13.8 - Prob. 38PCh. 13.8 - Prob. 39PCh. 13.8 - Prob. 40PCh. 13.8 - Prob. 41PCh. 13 - Prob. 42APCh. 13 - Prob. 43APCh. 13 - Prob. 44APCh. 13 - Prob. 45APCh. 13 - Prob. 46APCh. 13 - Prob. 48APCh. 13 - Prob. 49APCh. 13 - Prob. 51APCh. 13 - Prob. 52APCh. 13 - Prob. 53AP
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