The expected value (the maximum value over the life of the contract, including options, extensions, all remuneration and taxes, and all parts of a multi-part procurement) must be estimated before deciding the procurement method; a procurement must not be divided to avoid a threshold, and if the value cannot be estimated it must be treated as above the threshold.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.