C.16:5.1 - Name the measurand and measurement subject

M‑SUB‑1. Name the measurand: the quantity or characteristic intended to be measured. When FPF uses a non-quantity Characteristic, name the exact subject and the Characteristic whose Scale position is being attributed.

M‑SUB‑2. Preserve arity. An entity Characteristic has one subject; a relation Characteristic has the exact ordered tuple required by A.17. A relation reading is not silently rewritten as a unary property of one participant.

M‑SUB‑3. Distinguish the measurand from the actual subject state. A measurement result attributes values under a method and model; it does not make the physical, social, architectural, or epistemic state identical to the result episteme.