Subcontracting is a business model in which part of the manufacturing process is outsourced to another entity. Subcontracting is also referred to as Contract Manufacturing.
Multi-Tier is a business model that involves collaborating with multiple suppliers or partners.
Subcontracting with Multi-Tier Order Collaboration
It is possible to combine the features of the Subcontracting and Multi-Tier business models: outsourcing part of the manufacturing process to multiple suppliers or partners.