The smart factory IoT monitoring system integrates more than 200 industrial sensors on the production floor to collect temperature, humidity, vibration, and power consumption data in real time. The edge computing gateway processes data locally with latency of less than 10 milliseconds, enabling instant anomaly detection without relying on the cloud. Unplanned downtime was reduced by 45% and Overall Equipment Effectiveness (OEE) improved by 18% within six months of system deployment.