Standard Values in Routing linked to costing lot size in material master

Is is possible to set standard values in change routing (CA02) to call a variable/field that is stored in the material master (MM03)? Specifically I want to set the base quantity to always match the costing lot size if the costing lot size is below the capacity of the machine. Therefore I would need some kind of If Statement in the standard value field that can call the value from the material master, and decide which value to use based on a pre determined machine capacity, which would be part of the if statement. If anyone can give me guidance on this subject I would really appreciate it. In essence, I need the base quantity in the router to change if the costing lot size changes in the material master.

Thanks