Similar request at http://help.openerp.com/question/23931/manufacturing-after-production-quantities-for-bye-products-and-main-product/

And http://help.openerp.com/question/21443/how-to-replace-a-product-to-consume-in-manufacturing-order-in-v7/

And http://help.openerp.com/question/13958/is-it-possible-change-product-quantity-on-manufacturing-order/

@Saša: Thanks for your kind answer and addtional comments provided above. The solution suggested by kindiss to add the button to form view is quite close to what we are looking for. However, "name="380" in his finding doen't seem to work with the latest branch, since it lead to different view outside the MRP module. Let us wait for an expert to show us the correct solution then.

I am trying to post link to this thread to other similar threads (all the above) and ask them to make a vote for this, so we might get help sooner.

Maybe we could log at http://feedback.openerp.com ?

Also, I might arrange development of such feature, if more people would be willing to share the cost. :)

I think such feature that's allow users to edit or capture the actual consumed quantity, rather than strictly link with the quantity defined in BOM should be existed as "standard" if we really want to implement this in practical world.

To find out what is action ID "name="380" you can in developer mode got to confirmed state manufacturing order, move your mouse cursor on (Update), here you can see table with line Action ID:385, in my case now is 385, this number you need to enter.