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 2.9, Problem 33P
Summary Introduction
To determine: Estimates for the monthly seasonal factorsassuming no trend in walking shorts sales over the two years
Introduction:There is simple method of computing seasonal factors for a time series with seasonal variations and no trend. This method requires minimumdata of two seasons and involves 3 steps i.e.
- Computation of sample mean of whole data
- Division of each observation by sample mean
- Average the factors for like periods within each season.
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ABC Inc. sells patio sets. Monthly sales for a seven-month period were as follows:Â
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Month
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Feb
19
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20
Jun
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Forecast September sales volume using a five-month moving average approach.
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21
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7, The accompanying dataset provides data on the monthly usage of natural gas​ (in millions of cubic​ feet) for a certain region over two years. Implement the​ Holt-Winters multiplicative seasonality model with no trend to find the forecast for periods​ 13-26, where α=0.6and γ=0.9. Then find the MAD for periods​ 13-24.
Use the​ Holt-Winters multiplicative seasonality model with no trend to find the forecast for periods​ 13-18, periods​ 19-24, and then for periods 25 and 26.
​(Type integers or decimals rounded to two decimal places as​ needed.)
Period
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Month
Period
Gas Usage
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2
234
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3
149
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Apr
4
140
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May
5
54
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6
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Chapter 2 Solutions
Production and Operations Analysis, Seventh Edition
Ch. 2.4 - Prob. 1PCh. 2.4 - Prob. 2PCh. 2.4 - Prob. 3PCh. 2.4 - Prob. 4PCh. 2.4 - Prob. 5PCh. 2.4 - Prob. 6PCh. 2.4 - Prob. 7PCh. 2.4 - Prob. 8PCh. 2.4 - Prob. 9PCh. 2.6 - Prob. 10P
Ch. 2.6 - Prob. 11PCh. 2.6 - Prob. 12PCh. 2.6 - Prob. 13PCh. 2.6 - Prob. 14PCh. 2.6 - Prob. 15PCh. 2.7 - Prob. 16PCh. 2.7 - Prob. 17PCh. 2.7 - Prob. 18PCh. 2.7 - Prob. 19PCh. 2.7 - Prob. 20PCh. 2.7 - Prob. 21PCh. 2.7 - Prob. 22PCh. 2.7 - Prob. 23PCh. 2.7 - Prob. 24PCh. 2.7 - Prob. 25PCh. 2.7 - Prob. 26PCh. 2.7 - Prob. 27PCh. 2.8 - Prob. 28PCh. 2.8 - Prob. 29PCh. 2.8 - Prob. 30PCh. 2.8 - Prob. 31PCh. 2.8 - Prob. 32PCh. 2.9 - Prob. 33PCh. 2.9 - Prob. 34PCh. 2.9 - Prob. 35PCh. 2.9 - Prob. 36PCh. 2.9 - Prob. 37PCh. 2.10 - Prob. 38PCh. 2.10 - Prob. 42PCh. 2.10 - Prob. 43PCh. 2.10 - Prob. 44PCh. 2.10 - Prob. 45PCh. 2 - Prob. 47APCh. 2 - Prob. 48APCh. 2 - Prob. 49APCh. 2 - Prob. 50APCh. 2 - Prob. 51APCh. 2 - Prob. 52APCh. 2 - Prob. 53APCh. 2 - Prob. 54APCh. 2 - Prob. 55APCh. 2 - Prob. 56APCh. 2 - Prob. 57APCh. 2 - Prob. 58AP
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