OPERATIONS MANAGEMENT IN THE SUPPLY CHAIN: DECISIONS & CASES (Mcgraw-hill Series Operations and Decision Sciences)
7th Edition
ISBN: 9780077835439
Author: Roger G Schroeder, M. Johnny Rungtusanatham, Susan Meyer Goldstein
Publisher: McGraw-Hill Education
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Chapter 10, Problem 10P
A candy store has sold the following number of pounds of candy for the past three days. Assuming a = .4, complete the following table.
| Period | Dt | At | Ft | et | MADt | Tracking Signal |
| 0 | 16 | 1 | ||||
| 1 | 20 | |||||
| 2 | 26 | |||||
| 3 | 14 |
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7
Bill Kime's bowling ball factory makes bowling balls of adult size and weight only. The standard deviation in the weight of a bowling ball produced at the factory is known to be 0.39
pounds. Each day for 24 days, the average weight, in pounds, of 9 of the bowling balls produced that day has been assessed as follows
Day
1
2
3
4
5
6
Average (lb)
9.9
9.9
10.1
10.1
99
99
Day
7
8
9
10
11
12
Average (lb) Day Average (b)
13
14
15
16
17
18
10.1
10.0
10.0
10.1
10.1
10.0
9.9
10.1
10.1
10.0
10.1
10.1
Day
19
20
21
22
23
24
Average (lb)
99
10.0
10.1
9.9
10.0
10.0
a) Establish a control chart for monitoring the average weights of the bowling balls in which the upper and lower control limits are each two standard deviations from the mean What
are the values of the control limits?
Upper Control Limit (UCL)=b (Round your response to two decimal places)
DFC Company has recorded the past years sales for the company:
Year(t)
Sales(x)
(in Million Pesos)
2011(1)
2012(2)
2013(3)
2014(4)
2015(5)
2016(6)
2017(7)
2018(8)
2019(9)
2020(10)
219
224
268
272
253
284
254
278
282
298
Use the naïve model. Compute for MAE and MSE
Use a three period moving average. Compute for the MAE and MSE
Use the simple exponential smoothing to make a forecasting table. Compute the MAE and MSE of the forecasts. Alpha = 0.1
Use the least square method to make the forecasting table. Compute the MAE and MSE
*** Use excel or r programming
Chapter 10 Solutions
OPERATIONS MANAGEMENT IN THE SUPPLY CHAIN: DECISIONS & CASES (Mcgraw-hill Series Operations and Decision Sciences)
Ch. 10.S - Ace Hardware sells spare parts for lawn mowers....Ch. 10.S - eXcel The daily demand for chocolate donuts from...Ch. 10.S - The SureGrip Tire Company produces tires of...Ch. 10.S - eXcelManagement believes there is a seasonal...Ch. 10.S - Management of the ABC Floral Shop believes that...Ch. 10 - Prob. 1DQCh. 10 - What is the distinction between forecasting and...Ch. 10 - Qualitative forecasting methods should be used...Ch. 10 - Describe the uses of qualitative, time-series, and...Ch. 10 - Qualitative forecasts and causal forecasts are not...
Ch. 10 - Prob. 6DQCh. 10 - What are the advantages of exponential smoothing...Ch. 10 - How should the choice of be made for exponential...Ch. 10 - Prob. 9DQCh. 10 - Prob. 10DQCh. 10 - Explain how CPFR can be used to reduce forecasting...Ch. 10 - Under what circumstances might CPFR be useful, and...Ch. 10 - Daily demand for marigold flowers at a large...Ch. 10 - The number of daily calls for the repair of Speedy...Ch. 10 - 3-The ABC Floral Shop sold the following number of...Ch. 10 - The Handy Dandy Department Store had forecast...Ch. 10 - 5-The Yummy Ice Cream Company uses the exponential...Ch. 10 - Using the data in problem 2, prepare exponentially...Ch. 10 - Compute the errors of bias and absolute deviation...Ch. 10 - eXcel At the ABC Floral Shop, an argument...Ch. 10 - Only a portion of the following table for...Ch. 10 - A candy store has sold the following number of...Ch. 10 - eXcel A grocery store sells the following number...Ch. 10 - Prob. 12PCh. 10 - The Easyfit tire store had demand for tires shown...Ch. 10 - Prob. 14P
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