Seen broadly, the supply chain runs upstream, where suppliers furnish the organization with resources (materials, labour, information and data, workplaces, facilities and their utilities, equipment, consumables, ICT systems, transport, logistics, finance and other services its activities need), and downstream, where the organization's products and services reach its customers (transport, logistics, implementation, machinery installation and similar work carried out by the organization itself or by a third party acting under its responsibility); both directions are in scope, for organizations of every type and size. Because the end user may not be the immediate customer, use after delivery can affect brand and reputation, and contracts or end-user agreements can restrict later use or onward transfer. A supply chain exists wherever resources come from organizations outside the organization's direct management or control. Relationships may be upstream (long-term, for resources needed again and again, raw materials, workspace or professional services for instance; one-off for occasional needs such as special projects; professional associations such as franchises or supplier associations) or downstream (business-to-business, such as wholesalers and retailers, or business-to-customer), each resting on explicit commitments (a contract or purchase order) or implicit ones (what can reasonably be expected); and flexibility and control are limited with essential services and heavily regulated suppliers such as national electricity companies, telecommunications and internet providers.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.