Local causal factor- configuration

Hello All,

I'm trying to create a local causal factor because I want to simulate a peak in March.

I created for this a column in sales_data and a local causal factor (march).

The values that I inserted in sales_data are 0 and 1 , 1 is for March. The problem is that the causal factor is not having any effect on March.

I tried these formulas : sum(nvl(test_per,0))  and decode(test_per,1,1,0) without any results.

Could you please help me or give me some guidance on this?

Thanks!

SS.