The plan should set out which characteristics of purchased products are critical to the quality of what the organization supplies; how these are passed to suppliers so they are controlled over the life cycle of the product or service; how suppliers are evaluated, selected and controlled; what is required of supplier quality plans, or other supplier plans, and where they are referenced; how quality assurance requirements for purchased products, statutory and regulatory ones included, are met; how the conformity of purchased product is verified; and which facilities and services will be outsourced.
This control maps to 4 controls across 3 other frameworks. If you already hold one of them, the evidence you collected for it is the starting point here rather than new work.
Every mapping shown was judged rather than inferred from wording similarity, and the ones that failed review are published too. See the coverage reports and what was rejected.
The graph holds this control, the 4 it maps to, and the evidence behind each claim, over MCP and REST.