posting the stocks of child orders in a collective order

Dear Gurus,

I have a requirement wherein I want to post the stocks of the child orders produced in the storage location. We are using the collective orders and in some of the cases it takes very long to actually produce the FG. The stocks are not reflected in the system and client is not happy with the valuation of the production order WIP.

Please let me know if it is possible and how.

Thanks and Regards,

Sumeet