Core Concepts
The QELLVIS System Behavior Layer is built on a minimal set of structural concepts. These elements define how systems behave under pressure — deterministic, universal and domain‑agnostic.
Nodes represent units of value in a system. QELLVIS reads only their identifier and numeric load. All behavioral properties — flow, pressure, blockage — are computed by the engine.
Dependencies define directional relationships between nodes. They determine how value propagates through the system and where structural constraints emerge.
Flow represents the movement of value across dependencies. It is derived from node load and system topology — not from business semantics.
Pressure is accumulated flow that cannot propagate further. It reveals structural tension and highlights where the system begins to destabilize.
Blockage occurs when a node cannot pass value to its dependents. This may be due to structural constraints or external status flags. Blockages are central to understanding system failure points.
Events describe behavioral changes detected by the engine — flow shifts, pressure spikes, new blockages or resolved constraints. They form the timeline of system evolution.
The primary blockage is the root structural constraint causing system‑wide disruption. QELLVIS identifies it deterministically based on propagation failure.
Origin traces the causal chain leading to a blockage. It reveals which nodes contributed to the failure and how pressure propagated through the system.
A tick represents one deterministic execution of the engine. Snapshots capture the full system state at each tick, enabling replay and historical analysis.