Requirements can be minimum (acceptable levels, excluding undesirable features) or optional (preferred solutions linked to an evaluation criterion rewarding performance above the minimum and possibly a contract KPI), with variants a further technique; the market analysis informs what is minimum and optional, and where supplier capability is uncertain or uneven, competition should not be restricted unless the requirement is truly indispensable; where a supplier with lesser performance is selected, agreed progression should be monitored in the contract.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.