Current Materials - Alternate Group Rank
This field identifies the priority value for this alternate material within the alternate group of which it is a member. For the first material you add to an alternate group, the Alt Group Rank is automatically set to 0. A rank of 0 identifies this item as the primary material for this operation. The system plans alternate materials in sequence of Alt Group Rank. By default, it attempts to plan the primary material first (see “Use Latest Pull for Alternate Items” for information about how you can change the default planning behavior of alternate materials). You cannot change this Rank value after you save the record, so make sure this is the item you want as the primary item.