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Contributor II
Contributor II

Sales vs Forecast from prior period


I am trying to compare using a line chart by month year the sales versus  the forecast amount. However a forecast amount can change from one forecast cycle to another. Eg. We do a 24 month forecast for our  June 2020 sales in Jan, Feb etc.

I want to compare the amount that was sold against what was forecast for a month but being able to change the forecast cycle from  -1,-2,-3...-12  from that month year.

i want columns with the total qty by month year of forecast cycles from 1 to 12 months ago so that i can change in the chart the forecast cycle i want to compare against.

Yellow box here is a looking a forecast cycle 3 months previous of the month year.

2020-06-11 20_53_05-mape_logic (002).xlsx  -  Protected View - Excel.png

This will be used to calculate the MAPE so would like to do it in the load.

See sample chart below, explanation and data model



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