Ashu,
It is not clear what are the business requirements that drove you into this predicament, nor why setting the max time is not a valid solution for your situation.
PDS content is typically controlled in standard by settings in ECC. What ECC settings have you tried to prevent BOM explosion?
To me, the easiest standard solution for the business requirement to prevent explosion of these material BOMs would be to remove these materials from the BOMs. Since you do not intend to explode them, there is no reason to have them in the PDS at all.
It is my practice in SCN forums never to recommend enhancements.
Best Regards,
DB49