Clause 6.6 deals with quantification, data quality and reporting. The subject is the method and the data behind a quantified statement. A programme that meets the clause states the method, sets a data quality expectation and says how the result is reported. The life cycle terms in clause 3.4 and the boundary principle in clause 4.6 are the vocabulary it uses.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.