Honest limits

A digital twin is only as useful as its inputs and upkeep. If sensors stop reporting, a repair changes a pipe route, or nobody reviews alerts, the model gradually becomes another outdated drawing. Assigning an owner is part of the system, not paperwork added afterward.

Sensor placement also matters. A sensor on a damp patch tells Mara that water has already reached the wall. A flow or pressure measurement near the pipe may show an earlier change. Neither reading proves the cause on its own; it gives a reason to inspect.

Do not mistake a green status light for proof that the wall is dry. Each value comes from a particular sensor, at a particular time, and can be missing or wrong. A model supports judgment; it does not replace inspection or qualified repair work.

This proposal does not require a headset, a complex 3D scene, or surveillance of Saturday class. It requires a defined problem, measurements that fit that problem, and a response when the measurements change.

Common mistake: calling one sensor on an existing stain a complete digital twin.

Use those limits to design a small local pilot.