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Analysis Services Writeback – Working with Weight Expressions

While writeback has been around for a while, it didn't really get easy to do until Excel 2010 was released because wrapping a UI around it was cumbersome. Now that we have a simple writeback UI via the What-If analysis dialogs in Excel, it's pry worth poking around at how to get things to allocate the way you want.

Here's our starting point in the Adventure Works cube (note, I commented out all the scope statements in the MDX script that distribute quarterly quotas/targets to months - in AW, quotas only exist in the data warehouse at the calendar quarter level):

Let's start with something simple - Equal Allocation: