Adding a customized ABC classification for Item Categorization

Users want to use their internal classification for A,B,C categorization of items.

The classification will consist of Forecasted Demand of every item for the whole calendar year.

(Unit Price of Item)*(Forecasted Demand) = Value of item

This will give them better position for items to be included in Cycle Counts in the category of A,B and C.

Currently they are using CURRENT ON HAND VALUE as the criteria in ABC Classification Set, which needs to be updated and customized.

Is there any way to incorporate that?