Seasonal Variation
Give this one a try later!
a pattern that repeats itself at known regular intervals of time
Trend Variations
Give this one a try later!
increasing or decreasing over many years
Month Actual Forecasts
Jan 42 37
, Feb 58 50
March 58 58
April 77 67.5
May 91 84
June 102 96.5
July 124 113
August 148 136
Sept 171 159.5
Oct 177 174
Ten months of data and the forecasts for those same periods are in the table below.
What is the Mean Absolute Deviation for the forecast?
Give this one a try later!
7.35
Period Demand (units)
1 109
2 110
3 103
4 170
5 81
6 103
Suppose you are to generate a forecast for next week (period 7). From the data
above, what would this forecast be using exponential smoothing with an alpha value
of .4?
Give this one a try later!
118.99
Simple moving average
Give this one a try later!
a pattern that repeats itself at known regular intervals of time
Trend Variations
Give this one a try later!
increasing or decreasing over many years
Month Actual Forecasts
Jan 42 37
, Feb 58 50
March 58 58
April 77 67.5
May 91 84
June 102 96.5
July 124 113
August 148 136
Sept 171 159.5
Oct 177 174
Ten months of data and the forecasts for those same periods are in the table below.
What is the Mean Absolute Deviation for the forecast?
Give this one a try later!
7.35
Period Demand (units)
1 109
2 110
3 103
4 170
5 81
6 103
Suppose you are to generate a forecast for next week (period 7). From the data
above, what would this forecast be using exponential smoothing with an alpha value
of .4?
Give this one a try later!
118.99
Simple moving average
