SUPERVISORY CONTROL AND DATA ACQUISITION (SCADA)
system for production line monitory and control created Before IoT solution that relies on a centralized architecture and periodic data reading to reduce the need of human intervention

PROS
- real-time and reliable
 - tailored to operation technicians
 
CONS
- expensive, but worth for mission critical tasks
 - extensible, but within the same scope, (e.g., an additional sensor in the same machine or an additional machine in the same plant)
 - lack of standards, difficult to maintain/evolve
 - usually no interoperability (horizontal/vertical)