Seven signs your building management system needs an upgrade

Building management systems rarely die dramatically. They fade — a discontinued part here, a lost password there, an operator who quietly stops trusting the graphics — until one day the system is technically running and practically useless. Because the decline is gradual, the moment to act is easy to miss. Here are the signs we look for.

The seven signs

1. Spares are getting scarce. Controllers discontinued, repairs on eBay, support "best endeavours". You're one failure from an emergency project on someone else's timeline.

2. Only one company can log in. If credentials and tools sit solely with one supplier, every change is a captive purchase — covered in more depth in our piece on vendor independence.

3. The graphics don't match the building. Refurbished floors, removed plant, renamed rooms — none of it reflected. Operators stop believing the screen, then stop looking at it.

4. Alarms have become wallpaper. Hundreds of unacknowledged alarms means the real one will scroll past unseen. Alarm fatigue is a system telling you its priorities are wrong.

5. Everything is in hand. Valves wedged, plant switched to manual, overrides on overrides. Each one marks a place where automatic control lost an argument and nobody investigated why.

6. There's no data when you need it. "Why was Theatre 2 cold last Tuesday?" should take two minutes of trend history, not a shrug.

7. Bills climb without explanation. Consumption drifting up year on year with no change in use is a control system slowly letting go.

Upgrading without switching the building off

The fear that stalls action is downtime — and it's a solvable engineering problem, not a fact of life. A proper migration starts with a survey and points audit, so you know exactly what exists. Field devices that are sound — sensors, valves, actuators — usually stay, which contains cost. Controllers and supervision then move panel by panel in stages, with cutovers out of hours and fallback plans written before anyone touches a wire. The building keeps running throughout; most occupants never know it happened.

If three or more of the signs above feel familiar, the economics have probably already tipped — you're paying for the old system in energy, risk and captivity; you're just not seeing it itemised on an invoice.