The primary internal planning heuristic of the STSHC v1.0 framework. The SC provides a context-dependent, voluntary estimate of an operator's available capacity for a given session, used to route daily task allocation across the four capacity-neutral tiers. The SC functions strictly as a non-diagnostic planning tool — not a calibrated psychophysiological index or an empirical measure of biological capacity.

A self-reported, non-diagnostic index component representing basic physical energy availability before initiating tasks. Encompasses sleep quality, nutritional state, somatic readiness, and physical rest levels. MEI is a voluntary planning heuristic — not a clinical measurement of metabolic function or biological state.

A self-reported indicator representing the operator's perceived psychological safety baseline and environmental threat level. Lower ASI scores reflect elevated ABC (Affective Burden Coefficient) driven by relational pressure, performance-metric anxiety, or environmental instability. ASI is a voluntary planning heuristic — not a clinical measure of autonomic nervous system state.

A self-reported index reflecting current attentional clarity and working memory availability before engaging with complex tasks. PRS is modeled as lower under sustained high SFV and ABC because available bandwidth is redirected toward environmental monitoring and regulatory demands, reducing the residual capacity available for task execution (Pillar 3 — Leroy, 2009). PRS is a voluntary planning heuristic — not an objective neuropsychological measurement.

The cumulative physiological wear-and-tear cost incurred when an organism is required to sustain output under prolonged stress without adequate regenerative intervals (McEwen & Stellar, 1993). Within the STSHC framework, allostatic load accumulation is modeled as a long-term risk of ignoring sustained low SC scores — not a direct clinical measurement. The framework uses SC routing and the 6+1 Wave Cycle to support regenerative capacity and reduce long-term load accumulation.

The attentional carryover effect that occurs when a practitioner switches from an incomplete task to a new one — leaving residual attention on the prior task and reducing effective processing bandwidth for the current task. The STSHC framework uses batch communication windows and protected focus containers to reduce attention residue accumulation. The 20-minute interval structure in Conservation State task routing is a planning heuristic informed by attention residue theory — actual recovery times vary by individual, task type, and interruption severity.

A planning construct describing the elevated task-initiation cost and reduced engagement that occurs when an operator's work demands conflict with their autonomous motivational orientation or core values (Deci & Ryan, Self-Determination Theory; Steger et al., Work and Meaning Inventory). Meaning friction is modeled in the SC equation as a driver of high ABC. Reducing meaning friction — through value-congruent task allocation and meaning-aligned work design — is a key organizational lever in the STSHC v1.0 framework.

The foundational assertion of the STSHC v1.0 framework: human capacity is not a fixed trait but a dynamic, multi-layered state that fluctuates across time, context, and life circumstance. Variability is not dysfunction. Fluctuation is not failure. The framework treats neurological variance and capacity fluctuation as normal features of human systems requiring accommodation as infrastructure — not management as exception or pathology.

The STSHC v1.0 term for naturally occurring differences in cognitive processing architecture — including monotropic attention profiles (common in autistic practitioners), variable attention profiles (common in ADHD practitioners), and dynamic physical capacity profiles. The framework treats these as distinct capacity configurations requiring different environmental support structures (protected focus containers, asynchronous communication, interest-rotation intervals) — accommodated as organizational infrastructure, not managed as clinical exceptions. Neurological variance is not a deficit framing.

A processing characteristic common in autistic practitioners involving deep, sustained, single-channel attention allocation. Monotropic processing performs optimally when protected from unpredictable interruption and parallel task exposure. The STSHC framework accommodates monotropic attention through single-track task architecture, protected focus containers, and asynchronous-only communication during focus intervals — reducing SFV and supporting sustained PRS.