The technique and its manner of application are tailored to the context and the type and form of information stakeholders need, scaled to the importance of the decision and constrained by time, resources and opportunity cost. Whether to go descriptive or numeric turns chiefly on which output form is most useful and how much dependable data exists, with numeric techniques generally needing sound data, though the discipline of using one can sharpen understanding even where data is thin. Several techniques may be considered or combined and different ones may suit as information grows. Factors to weigh include purpose, stakeholder needs, legal, regulatory and contractual requirements, operating environment, the consequence of a wrong decision, decision criteria, time, information available, complexity and available expertise. As uncertainty, complexity and ambiguity rise, wider stakeholder consultation is needed. Annex B techniques are non-exhaustive and none is recommended as best for a given case, so the chosen technique is checked for appropriateness, reliability and effectiveness.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.