The Future is Multimodal
One signal tells you part of the story. Multimodal tells you all of it. Mechanical, electrical, and operational data, combined into a single intelligence layer that catches failures the individual signals miss. A vibration spike on its own is ambiguous. Read next to current, temperature, and how the machine is actually running, it's usually clear what's happening and whether it's worth acting on. Most signals miss things the others catch. Reading them together is the point.
