Procurement processes cover obtaining products and services for the project (ISO 9001:2015 clause 8.4 sets requirements for controlling externally provided processes, products and services; purchase, acquisition and procurement are used interchangeably). They are: planning and controlling procurement (7.8.2); documenting procurement requirements (7.8.3); managing and developing external providers (7.8.4); contracting (7.8.5); and controlling contracts (7.8.6).
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.