French to English Tech/Engineering Food & Drink audit on cake factory

For cahier des charges, I have 'schedule of conditions' but don't know what MP stands for. It may be a UK term, as many have been so far in the text.

It is an audit on a factory producing cakes and this particular section is:
Revue de contrat et maitrise des achats.

List:
Cahier des charges des matieres premieres.
Mise a' jour des cahiers des charges MP.
Referencement des fournisseurs.
Evaluation des fournisseurs.
Audit des fournisseurs.

Any idead much appreciated.