The CQI-27 Special Process: Casting System Assessment provides requirements for foundry suppliers of OEM automotive castings. It is not a detailed description of the entire foundry process. Rather, the focus is on common failure modes that cause OEM customers to receive non-conforming castings from foundries. It is written from an OEM and Tier 1 perspective. It is the voice of the customer and includes specific activities that the foundry industry needs to improve upon.