Measurement standards (electrical engineering) is a set of precisely defined values, physical artifacts, or formal procedures established to ensure the accuracy, precision, comparability, and traceability of measurements of electrical quantities such as voltage, current, resistance, impedance, power, frequency, and time. These standards serve as fundamental references for calibrating instruments, validating measurement methods, and establishing metrological hierarchies within the field of electrical engineering. Their existence is critical for scientific research, technological development, manufacturing quality control, and regulatory compliance, enabling consistent and reliable characterization of electrical and electronic components, circuits, and systems.