Hi @jimfeng5 One way to create a WhatIf analysis is to take your final planned/forecasted amount and move it to a module (let's call it WhatIf module) with the same dimensions as the original forecast module with an additional dimension for scenarios (baseline, best case, worst cast, etc). You can then have a system module (with only scenario list as a dimension) that lets the end user input % changes for each scenario. The formula in the WhatIf module that pulls in the original forecast data should be equal to the original amount + (original amount * % change from the scenarios system module). As you select different scenarios (best case, baseline, worst case, etc.) in that module you should see your numbers change. Attached are some screenshots for a visual. P.S. - If this solution does not work with your needs, it is also possible to do something like this using a Line Item Subset
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