Smooth Promotion Consumption indicator on Article Master (Retail) Does not Work

Dear friends,

Our company system is IS Retail 470. In RP requirement planning, we have been using forcast model G average and Period Indicator as W weekly. So far it runs OK. However, when I try to use "Smooth Promotion Consumption indicator", it seems the promotion period sales qty are still being calculated in the forecast planning. Does any body know this problem? Any experience to solve this problem before?

Best regards,

Connie.