Comment 12 for bug 670451

By the way, if my memories are right, Omar from Pexego already worked around these problems on the 5.0 version for one customer: he created several modules to do full stock traceability as needed by the dairy industry (cheese, yogurt, cream... fabrication from milk).

I don't recall the exact features, but I remember it managed cost price and lot info in stock moves (cost price per lot, not per product), and was able to report the full forward/backward traceability of lots (i.e. 'everything that has been made using milk from this lot' / 'every product lot that has been used to make this cheese').

Some references:
http://translate.google.com/translate?hl=es&sl=es&tl=en&u=http%3A%2F%2Fwww.pexego.es%2Fblog%2F2010%2F04%2F24%2Ftazabilidad-para-la-industria-agroalimentaria-en-openerp (Google translation from Spanish, sorry!)
http://bazaar.launchpad.net/~openerp-community/openobject-addons/trunk-addons-community/revision/277 (I don't know if that was the last version)

Also, I know that people from Ting! (another Spanish OpenERP partner), Ana Juaristi and others have been working hard on creating modules to improve the MRP, production and cost management.
http://translate.google.com/translate?js=n&prev=_t&hl=es&ie=UTF-8&layout=2&eotf=1&sl=es&tl=en&u=http%3A%2F%2Fwww.openerpsite.com%2Ffabricacion-en-openerp%2F2227.html (Google translation from Spanish, sorry!)

So, as a summary: Several OpenERP partners from Spain have been working on this for a while (*), maybe they can contribute here.

* @Olivier: do you remember the "Jornadas OpenERP 2010" in Spain? :) Omar, Carlos and Juaristi spent half of the time between of the conferences speaking of this topic!