The risk of failing to deliver products and services to customers because the supply chain was disrupted stays with the organization, which owns it and must reduce it by being ready to respond to such a disruption. Customers blame the organization, not its suppliers, when delivery fails, so a problem anywhere in the supply chain puts the organization's own brand and reputation at risk.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.