Filter conditions can now be directly set in filter commands. Scheduling time can be reduced by filtering in several steps.
If you want to filter manufacturing orders of item A that are not pegged to receive orders, we could use && to combine conditions as in
ME.Item == ‘A’&&ME.’Order type’==’Manufacturing order’&&SumIF (ME.’Rightmost orders’,TARGET.’Order type’=’Sales order’,1)==0
and filter using a single order filter. But instead, we can separate conditions in the following manner and execute filtering in steps. As filtering with the item and order type is performed first, the number of evaluations of “ME.’Rightmost orders’” is reduced and this in turn reduces the processing time.

Asprova HELP -> http://lib.asprova.com/onlinehelp/en/AS2003HELP08990900.html -> [Appendix]-[Reducing scheduling time] – HelpNo.:8990900