Annex C names five measurement data types: count, time, ratio, percentage and statistical. The type decides how a result can be read and compared. The five types are the grammar of a quality measure. A count says how many; a time says how long; a ratio compares two quantities; a percentage expresses a proportion of a whole; a statistical type summarises a distribution. The choice is not cosmetic. A count cannot be averaged across products of different sizes, a percentage hides its denominator, a mean hides the tail, and a ratio of two ratios is a different claim from either. The annex is informative, but a team that ignores the type will produce reports that look precise and cannot be compared.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.