Batch Number Assignment

Hallo, everyone,

I'm developing a solution for individual batch number assignment.

When a user creates a process order, the batch number should be generated according to following rules:

XXYY000001

XX - chararater, depends on the material master data, e.g. RL for material group 0001 (just an example).

YY- year, z.B. 08 for 2008

000001 - 6-digit number, starting from 000001 for every new year.

I have already found the userexit to define the rules. But what I'm still looking for is how to define the number range object. How can I combine the customizing of the number range object and the user exits to make the whole solution reasonable?

Best regards

Yong