BMS / BAS

The building management system runs the facility’s HVAC and utilities: setpoints, sequences, alarms and trending for air handling, temperature, humidity and room pressure. It is a control system, and the distinction from the environmental monitoring system is deliberate — one maintains the condition, the other records it, and collapsing the two produces a record whose independence cannot be argued.

It is nonetheless GMP-relevant, because the conditions it controls are the conditions product is made in. Setpoint changes, alarm limit changes and sequence modifications alter the qualified state of classified areas, so access to them belongs under control, and changes belong under change control with an assessment of which rooms are affected. The common failure is a facilities group administering the system entirely outside the quality system.

Its alarms are also an early-warning instrument rather than a nuisance. A fan struggling, a coil fouling or a filter bank loading shows up here as drifting effort well before the room fails its classification, and treating BMS trends as maintenance data rather than quality data forfeits that lead time.

• —Controls HVAC and utilities; the EMS records conditions independently.
• —Setpoint, alarm-limit and sequence changes alter the qualified state of the rooms served.
• —Access and change control belong inside the quality system, not only in facilities.
• —Trends give early warning of fan, coil and filter degradation before classification fails.
• —Collapsing control and monitoring into one system removes the record’s independence.

EU GMP Annex 11 (computerised systems); EU GMP Annex 1 (2022) for monitoring expectations; ISPE GAMP 5 (2nd ed., 2022).