Comment 2 for bug 809858

It is not about sub_product, that was an example, my inspiration.

Is about the BOM of a finished product, where some raw material I need consumed in fixed qty.

Here is an ongoing forum discussion:
http://www.openerp.com/forum/post87407.html#p87407
also
http://www.openerp.com/forum/topic26354.html

So:

I want to have on a BOM:

Components:
product | qty | qty type | UOM | valid from | valid until
---------------------------------------------------------------------------------------------------------------------------------------------
Cardboard 1000x1000 1 Variable PCE
Glue 1 Variable mg
Machine knife 1 Fixed PCE

Then on the subproduct form I would have product:
Machine knife 1 Fixed PCE

So the point is that there will be the "knife" participating in production, it's stock move would be recorded, but then put back into stock.

I hope I have cleared a bit my pint, if not, please ask more info.
Thanks!