Factory-floor workers cannot get real-time machine troubleshooting because air-gapped networks block cloud AI

Manufacturing facilities running SCADA and industrial control systems enforce strict air-gap policies — no device on the factory network can reach the public internet — because a single inbound connection creates an attack vector that could shut down a production line worth $500,000/hour. When a CNC operator encounters an unfamiliar error code or alarm on a machine, they cannot pull out their phone and ask ChatGPT because the facility's Faraday-caged environment blocks cellular signals by design. They instead flip through a 400-page paper manual or wait 45 minutes for the one maintenance engineer who knows that specific machine. An on-device Gemma 4 fine-tuned on the facility's specific machine manuals, error codes, and troubleshooting procedures runs on a phone or tablet with WiFi and cellular radios disabled, fully compliant with air-gap policies. The AI must be physically incapable of making network connections to be permitted in these environments — cloud AI is not just inconvenient here, it is banned by security policy.