MyLab Operations Management with Pearson eText -- Access Card -- for Operations Management: Processes and Supply Chains
MyLab Operations Management with Pearson eText -- Access Card -- for Operations Management: Processes and Supply Chains
11th Edition
ISBN: 9780133885583
Author: Lee J. Krajewski, Manoj K. Malhotra, Larry P. Ritzman
Publisher: PEARSON
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Chapter 8, Problem 27P
Summary Introduction

Interpretation: The time suitable in year 6 for maintenance of the Comstock plant is to be determined.

Concept Introduction: Activities done for maintaining the plant in proper working condition to avoid breakdown and loss is called maintenance.

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Tom Glass forecasts electrical demand for the FlatlandsPublic Power District (FPPD). The FPPD wants to take itsComstock power plant out of service for maintenance whendemand is expected to be low. After shutdown, performingmaintenance and getting the plant back on line takes two weeks. The utility has enough other generating capacity tosatisfy 1,550 megawatts (MW) of demand while Comstockis out of service. Table 8.5 shows weekly peak demands(in MW) for the past several autumns. When next in year 6should the Comstock plant be scheduled for maintenance?
Using the accompanying log-log graph, answer the following questions: What are the implications for management if it has forecast its cost on the optimum line? What could be causing the fluctuations above the optimum line? If management forecast the tenth unit on the optimum line, what was that forecast in hours? If management built the tenth unit as indicated by the actual line, how many hours did it take?
The Polish General’s Pizza Parlor is a small restaurant catering to patrons with a taste for European pizza. One of its specialties is Polish Prize pizza. The manager must forecast weekly demand for these special pizzas so that he can order pizza shells weekly. Recently, demand has been as follows: Week Pizzas Week Pizzas June 2 50 June 23 56 June 9 65 June 30 55 June 16 52 July 7 60 a. Forecast the demand for pizza for June 23 to July 14 by using the simple moving average method with n = 3. Then, repeat the forecast by using the weighted moving average method with n = 3 and weights of 0.50, 0.30, and 0.20, with 0.50 applying to the most recent demand. b. Calculate the MAD for each method.

Chapter 8 Solutions

MyLab Operations Management with Pearson eText -- Access Card -- for Operations Management: Processes and Supply Chains

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