SCADA stands for?

• A. System Control and Data Assessment
• B. Semi-Continuous Data Acquisition
• C. Supervised Control and Data Analysis
• D. Supervisory Control and Data Acquisition

Answer: (D)

SCADA is the term for systems that monitor and control dispersed industrial processes. The expansion Supervisory Control and Data Acquisition captures exactly what these systems do: “Supervisory” refers to the oversight provided by operators, “Control” means sending commands to field devices, “Data” is the measurements collected from sensors, and “Acquisition” is the process of gathering that data for real-time monitoring and analysis. The other wordings don’t fit the standard meaning: using Assessment instead of Acquisition changes the focus to evaluating data rather than collecting it, calling it Semi-Continuous Data Acquisition isn’t the conventional descriptor, and using Supervised with Analysis shifts the emphasis away from collecting data to interpreting it. This makes Supervisory Control and Data Acquisition the correct and widely accepted expansion.