If I understood your question, you should be looking at Business Rule Configuration, specifically BOM Release Rule.
This business rule ensures that all resulting objects are at an appropriate state and all their first-level dependants are at the appropriate state. If a child object is also a resulting object, that child goes to the target state when released through the change notice, instead of staying at the current state.
http://www.ptc.com/cs/help/windchill_hc/wc102_hc/index.jspx?id=BusRulesBOMReleaseRuleRef&action=show
Thanks,
Binesh
Barry Wehmiller International