Here you can select the code for the number series that you want the program to use when assigning numbers to firm planned production orders. Click the AssistButton to the right of the field to see the number series, in the No. Series table.
If you want to use more than one number series for firm planned production orders, you can set up a relationship between the relevant series in the No. Series Relationship table. This will allow you to use one code to represent two or more number series.