Order range while running KKAO, KKS1 and CO88 Collective Processing

Hi

When we run KKS1, the system considers all process orders in collective variance calculation. We want to restrict order range on the basis of Order Numbers and/or Dates. Is there any way we can restrict order range in these transactions.

Once my senior used SE38 alongwith some code / detail for such processing, unfortunately currently he is not available and I have to run that.

I need to run closing of Jan and System is considering orders of Feb as well.

Does anyone have idea?

Thanx in advance.