WMAPE formula Help

D

Darryll

New Member
Joined
Nov 15, 2011
Messages
1
Hello <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p>
<o:p> </o:p>
Does anyone know a formula to calculate WMAPE – Weighted Mean Absolute Percentage Error? I am currently using the MAPE measure however I am told Weighting the error would give me a more accurate figure as I will be putting more emphasis on the higher volume lines.<o:p></o:p>
<o:p> </o:p>
My Current Formula for MAPE is as follows;<o:p></o:p>
<o:p> </o:p>
=IF(AND(SUM(Actual)=0,SUM(Forecast)=0),0,IF( SUM(Actual)=0,100,('Abs Error'/Actual)))<o:p></o:p>
<o:p> </o:p>
<o:p> </o:p>
<TABLE style="MARGIN: auto auto auto -1.15pt; WIDTH: 219pt; BORDER-COLLAPSE: collapse; mso-yfti-tbllook: 1184; mso-padding-alt: 0cm 5.4pt 0cm 5.4pt" class=MsoNormalTable border=0 cellSpacing=0 cellPadding=0 width=292><TBODY><TR style="HEIGHT: 15pt; mso-yfti-irow: 0; mso-yfti-firstrow: yes"><TD style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext 1pt solid; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 48pt; PADDING-RIGHT: 5.4pt; HEIGHT: 15pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt" vAlign=bottom width=64 noWrap>Actual<o:p></o:p>
</TD><TD style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #f0f0f0; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 48pt; PADDING-RIGHT: 5.4pt; HEIGHT: 15pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-top-alt: solid windowtext .5pt; mso-border-bottom-alt: solid windowtext .5pt; mso-border-right-alt: solid windowtext .5pt" vAlign=bottom width=64 noWrap>Forecast<o:p></o:p>
</TD><TD style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #f0f0f0; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 48pt; PADDING-RIGHT: 5.4pt; HEIGHT: 15pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-top-alt: solid windowtext .5pt; mso-border-bottom-alt: solid windowtext .5pt; mso-border-right-alt: solid windowtext .5pt" vAlign=bottom width=64 noWrap>ABS<o:p></o:p>
</TD><TD style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #f0f0f0; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 75pt; PADDING-RIGHT: 5.4pt; HEIGHT: 15pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-top-alt: solid windowtext .5pt; mso-border-bottom-alt: solid windowtext .5pt; mso-border-right-alt: solid windowtext .5pt" vAlign=bottom width=100 noWrap>MAPE<o:p></o:p>
</TD></TR><TR style="HEIGHT: 15pt; mso-yfti-irow: 1"><TD style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext 1pt solid; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 48pt; PADDING-RIGHT: 5.4pt; HEIGHT: 15pt; BORDER-TOP: #f0f0f0; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-bottom-alt: solid windowtext .5pt; mso-border-right-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" vAlign=bottom width=64 noWrap>
1200<o:p></o:p>​
</TD><TD style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #f0f0f0; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 48pt; PADDING-RIGHT: 5.4pt; HEIGHT: 15pt; BORDER-TOP: #f0f0f0; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-bottom-alt: solid windowtext .5pt; mso-border-right-alt: solid windowtext .5pt" vAlign=bottom width=64 noWrap>
800<o:p></o:p>​
</TD><TD style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #f0f0f0; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 48pt; PADDING-RIGHT: 5.4pt; HEIGHT: 15pt; BORDER-TOP: #f0f0f0; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-bottom-alt: solid windowtext .5pt; mso-border-right-alt: solid windowtext .5pt" vAlign=bottom width=64 noWrap>
400<o:p></o:p>​
</TD><TD style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #f0f0f0; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 75pt; PADDING-RIGHT: 5.4pt; HEIGHT: 15pt; BORDER-TOP: #f0f0f0; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-bottom-alt: solid windowtext .5pt; mso-border-right-alt: solid windowtext .5pt" vAlign=bottom width=100 noWrap>
33.3%<o:p></o:p>​
</TD></TR><TR style="HEIGHT: 15pt; mso-yfti-irow: 2"><TD style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext 1pt solid; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 48pt; PADDING-RIGHT: 5.4pt; HEIGHT: 15pt; BORDER-TOP: #f0f0f0; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-bottom-alt: solid windowtext .5pt; mso-border-right-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" vAlign=bottom width=64 noWrap>
100<o:p></o:p>​
</TD><TD style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #f0f0f0; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 48pt; PADDING-RIGHT: 5.4pt; HEIGHT: 15pt; BORDER-TOP: #f0f0f0; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-bottom-alt: solid windowtext .5pt; mso-border-right-alt: solid windowtext .5pt" vAlign=bottom width=64 noWrap>
150<o:p></o:p>​
</TD><TD style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #f0f0f0; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 48pt; PADDING-RIGHT: 5.4pt; HEIGHT: 15pt; BORDER-TOP: #f0f0f0; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-bottom-alt: solid windowtext .5pt; mso-border-right-alt: solid windowtext .5pt" vAlign=bottom width=64 noWrap>
50<o:p></o:p>​
</TD><TD style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #f0f0f0; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 75pt; PADDING-RIGHT: 5.4pt; HEIGHT: 15pt; BORDER-TOP: #f0f0f0; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-bottom-alt: solid windowtext .5pt; mso-border-right-alt: solid windowtext .5pt" vAlign=bottom width=100 noWrap>
50.0%<o:p></o:p>​
</TD></TR><TR style="HEIGHT: 15pt; mso-yfti-irow: 3"><TD style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext 1pt solid; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 48pt; PADDING-RIGHT: 5.4pt; HEIGHT: 15pt; BORDER-TOP: #f0f0f0; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-bottom-alt: solid windowtext .5pt; mso-border-right-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" vAlign=bottom width=64 noWrap>
200<o:p></o:p>​
</TD><TD style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #f0f0f0; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 48pt; PADDING-RIGHT: 5.4pt; HEIGHT: 15pt; BORDER-TOP: #f0f0f0; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-bottom-alt: solid windowtext .5pt; mso-border-right-alt: solid windowtext .5pt" vAlign=bottom width=64 noWrap>
100<o:p></o:p>​
</TD><TD style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #f0f0f0; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 48pt; PADDING-RIGHT: 5.4pt; HEIGHT: 15pt; BORDER-TOP: #f0f0f0; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-bottom-alt: solid windowtext .5pt; mso-border-right-alt: solid windowtext .5pt" vAlign=bottom width=64 noWrap>
100<o:p></o:p>​
</TD><TD style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #f0f0f0; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 75pt; PADDING-RIGHT: 5.4pt; HEIGHT: 15pt; BORDER-TOP: #f0f0f0; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-bottom-alt: solid windowtext .5pt; mso-border-right-alt: solid windowtext .5pt" vAlign=bottom width=100 noWrap>
50.0%<o:p></o:p>​
</TD></TR><TR style="HEIGHT: 15pt; mso-yfti-irow: 4; mso-yfti-lastrow: yes"><TD style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext 1pt solid; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 48pt; PADDING-RIGHT: 5.4pt; HEIGHT: 15pt; BORDER-TOP: #f0f0f0; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-bottom-alt: solid windowtext .5pt; mso-border-right-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" vAlign=bottom width=64 noWrap>
8000<o:p></o:p>​
</TD><TD style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #f0f0f0; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 48pt; PADDING-RIGHT: 5.4pt; HEIGHT: 15pt; BORDER-TOP: #f0f0f0; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-bottom-alt: solid windowtext .5pt; mso-border-right-alt: solid windowtext .5pt" vAlign=bottom width=64 noWrap>
6900<o:p></o:p>​
</TD><TD style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #f0f0f0; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 48pt; PADDING-RIGHT: 5.4pt; HEIGHT: 15pt; BORDER-TOP: #f0f0f0; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-bottom-alt: solid windowtext .5pt; mso-border-right-alt: solid windowtext .5pt" vAlign=bottom width=64 noWrap>
1100<o:p></o:p>​
</TD><TD style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #f0f0f0; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 75pt; PADDING-RIGHT: 5.4pt; HEIGHT: 15pt; BORDER-TOP: #f0f0f0; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-bottom-alt: solid windowtext .5pt; mso-border-right-alt: solid windowtext .5pt" vAlign=bottom width=100 noWrap>
13.8%<o:p></o:p>​
</TD></TR></TBODY></TABLE>
<o:p> </o:p>
<o:p> </o:p>
Any help would be appreciated?<o:p></o:p>
<o:p> </o:p>
Thanks<o:p></o:p>
 
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