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Tutorial 2 - Blanks (Chapter 2 - Demand Forecasting)2

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Operations Management, Supply Chain Management

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  • March 28, 2018
  • 11
  • 2016/2017
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Universitätsprofessor
Dr.-Ing. Bernd Hellingrath
Lehrstuhl für Wirtschaftsinformatik
und Logistik

Leonardo-Campus 3
48149 Münster

Tel. +49 251 83-38000
Fax +49 251 83-38009
Hellingrath@ercis.de



Exercise Operations Management
Chapter 2 – Demand Forecasting (Part 2)

Please note: In general round off to two digits.

, 2


Exercise 4: Moving Average, Simple Exponential Smoothing

The RoboTec Inc. has not changed the marketing expenses for a well-established welding robot
since several periods. Hence, the demand for this robot is approximately at a constant level for
some time and fluctuates only slightly. A good forecasting method should be used in order to
further decrease inventory and back order costs as well as to remain a competitive price. The
historic data about demand quantities for the welding robot is provided by the marketing
director (we are in period 10):


Requested
Period t Number [Robot]
1 154
2 170
3 155
4 159
5 178
6 181
7 164
8 157
9 168
10 183

a) Illustrate the demand behavior.




180

160

140
Requested Number [Item]




120

100

80

60

40

20

0
0 1 2 3 4 5 6 7 8 9 10 11 12
Period

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