As a prerequisite, the BOM position attribute ALTERN_IDENT must be available. Create the ALTERN_IDENT attribute on the A.50.01 Attributes screen with Char= 60, Form Width=20, Unit= ‘-‘. Next, assign this attribute to the PIPING discipline as a group dependent attribute for the piping commodity group on the B.10.04 Position Attributes screen and enable it by assigning it to a list view on the A.20.06.11 Attribute Security screen.
For more information, see Position Attributes and Discipline BOM Views.