1

1. Given is a historical time series for job services demand in the prior 6 months.
   

   Month	Demand
   1	751
   2	656
   3	717
   4	633
   5	705
   6	714

   
   Use the table below to answer all questions:
   

   Month	Demand	Forecast
   1	751	F1
   2	656	F2
   3	717	F3
   4	633	F4
   5	705	F5
   6	714	F6
   7	Â	F7

   
   If the demands forecast is Not Possible (NP) to generate for a particular month, then you must type in NP as your answer.
   a) The F3 by using Naïve forecasting method = _______
   b) The F3 by using 2 months moving average = _____ (in 2 decimal places)
   c) The F4 by using Naïve forecasting method = _____
   d) The F4 by using 4 months moving average =_____ (in 2 decimal places)
   e) The F6 by using 3 months moving average = ________(in 2 decimal places)
   f) The F7 by using 4 months moving average = ________ (in 2 decimal places)

2

1. Given is a historical time series for job services demand in the prior 6 months.
   

   Month	Demand
   1	812
   2	721
   3	799
   4	719
   5	801
   6	767

   
   The Period 5 forecast by using weighted moving average with weights of 0.05, 0.25, 0.40, and 0.30 = ______ (in 2 decimal places)

3

1. Given is a historical time series for job services demand in the prior 6 months.
   

   Month	Demand
   1	635
   2	754
   3	706
   4	618
   5	725
   6	745

   
   The Period 4 forecast by using exponential smoothing with 0.25 alpha = _____ (in 2 decimal places)

4.

1. National Scan, Inc., sells ratio frequency inventory tags. Monthly sales for a 6-month period were as follows:
   

   Month:	Sales
   Feb	37
   Mar	41
   Apr	42
   May	51
   Jun	54
   Jul	62

   
   Use an appropriate forecasting method to prepare forecast Sales.
   a) The May forecast by using the appropriate forecasting method is ____ (in 4 decimal places).
   b) The August forecast by using the appropriate forecasting method is ____ (in 4 decimal places).

5

1. Given is a historical time series for job services demand in the prior 6 months.
   

   Month	Demand
   1	25
   2	24
   3	27
   4	23
   5	25
   6	26

   
   a) The MAE based on the Exponential smoothing a = 0.2 method = ___ (4 decimal places)
   b) The MAE based on the 3 months moving average method = ___ (in 4 decimal places)
   c) Use MAE as an criterion to evaluate forecasting methods I (exponential smoothing, a = 0.2 ) and II (3 month moving average). The most accurate forecasting methods between I and II is method ____ (entert I or II)