Supervisory Control And Data Acquisition

SCADA (Supervisory Control and Data Acquisition) is a computerized system of software and hardware that gathers, processes, and applies operational controls over long distances to monitor and regulate remote mechanical or electrical operations. It integrates field devices, communication infrastructure, and a central Human-Machine Interface (HMI) for real-time visualization and control of industrial processes.

On the shop floor or in asset reliability, SCADA connects field sensors and actuators via RTUs and PLCs to control room operators, continuously logging process variables in a historian to provide longitudinal baselines for detecting subtle performance deviations. It is best suited for geographically dispersed assets such as pipelines, power grids, water networks, and multi-site manufacturing, enabling remote coordination and handling interruptions via remote control. In CMMS contexts like ServiceGrid, SCADA historians feed real-time condition data into reliability models to automate maintenance triggers and reduce downtime.

• ⚠️Cybersecurity vulnerabilities: SCADA systems face critical challenges regarding cyber-physical security, where breaches can disrupt smart grid reliability and cause catastrophic operational failures.
• ⚠️Communication data integrity loss: Delays, latency, or data corruption in communication channels can lead to inaccurate control decisions and system unreliability.
• ⚠️Lack of fault tolerance: Absence of error correction mechanisms in SCADA architecture degrades error control performance, leading to unreliability in critical monitoring functions.