In: Math
A company has developed a forecast using the Delphi method for January through June
1. Using the data provided, what is the Mean Absolute Deviation for the forecast method?
2. Using the data provided, what is the MAPD?
Month |
Demand |
Forecast |
January |
232 |
234 |
February |
225 |
222 |
March |
239 |
240 |
April |
260 |
261 |
May |
234 |
231 |
June |
260 |
262 |
Let's do calculation in excel:
Error = Actual value - Forecast value
1. Using the data provided, what is the Mean Absolute Deviation(MAD) for the forecast method?
MAD is the average of absolute error
So from the above output , MAD = 2
2. Using the data provided, what is the MAPD?
MAPD is the average of relative absolute errors ( |error| / actual *100 )
So from the above output , MAPD = 0.84%.
The formulae used on the above excel-sheet are as follows: