Building BIOS Architecture

58. Building State Model

The Building State Model provides the authoritative representation of the building’s current verified condition.

The building shall not be represented by a single undifferentiated state. Its condition shall be described through a coordinated state vector containing, at minimum:

lifecycle state;

configuration state;

BIOS integrity state;

operational state;

safety state;

security state;

resource state;

communication state;

maintenance state;

emergency state.

Each state value shall include:

subject identity;

state category;

current value;

source;

timestamp;

verification level;

confidence where applicable;

effective configuration version;

active restrictions;

related events.

Building-wide state shall be derived from component, Interface, Cartridge, zone, service, and dependency states through explicit aggregation rules.

The BIOS shall distinguish among:

Declared State: reported by the entity or manufacturer;

Commanded State: state requested by a controller or user;

Observed State: condition detected through communication, sensing, or inspection;

Verified State: condition confirmed by an approved method;

Inferred State: condition calculated or estimated from indirect information;

Building state examples include:

unconfigured;

under construction;

commissioning;

operational;

partially operational;

degraded;

maintenance;

isolated;

emergency;

recovery;

decommissioned.

A building may be Operational while one independent noncritical zone is Degraded. Aggregate-state rules shall therefore preserve zone and system detail rather than reducing the entire building to the worst isolated condition without justification.