Hai Venu and Moazzam,
As per Moazzam suggestion,
IN VOV4
OR + ERLA + _____+_____ = TAN || TAQ
OR + ERLA + _____+ TAQ = TAE
In this case, system default give the normal item category.
When the customer require BOM procedure, entered TAQ in the line item and system given the list of details.
SD experts : can Item category Usage can be used ???
Regards,
Mani