La Profilée (LP) establishes a universal persistence condition IR = R / (F · I · C) ≤ 1, where F denotes Frame strength — the structural fraction of total integration capacity directed toward identity preservation. Prior publications have operationalized IR diagnostically, but F has been measured primarily through its consequences: when IK collapses and IR rises, F is inferred to have been low. This post-hoc measurement is structurally permissible but epistemically insufficient for two purposes: independent falsification of LP's structural mapping, and prospective diagnostic use before collapse is visible. This paper derives and specifies independent measurement protocols for F across three domains — organisational systems, biological systems, and persons. In each domain, F is defined through structural observables that are logically prior to and causally independent of IR trajectory: they can be assessed without knowing whether the system is in overload, without reference to outcomes, and without presupposing the validity of LP. The protocols specify concrete proxy variables, measurement procedures, and independence criteria. The central claim is: F is independently measurable through the stability and invariance of the structural properties that define what the system is — not through what the system produces. For organisations, this means governance structure and strategic invariance. For biological systems, homeostatic set-point maintenance and conserved regulatory architecture. For persons, self-concept clarity and values congruence. In each case, the measurement is structurally justified, not merely stipulated.
Marc Maibom (2026) studied this question.