Online Quality Control (OQC) is a systematic process of monitoring, inspecting, and verifying product quality during the manufacturing process. Unlike final inspection alone, OQC ensures that quality checks are performed continuously at every critical production stage, enabling immediate detection and correction of defects before products move to the next operation. In electronics manufacturing, OQC plays a vital role in maintaining product consistency, reducing rework, minimizing production losses, and ensuring customer satisfaction. Online Quality Control refers to real-time inspection and monitoring activities conducted throughout the manufacturing process. By integrating quality checkpoints directly into production lines, manufacturers can identify deviations, defects, and process variations early, ensuring that only products meeting quality standards proceed further. OQC combines visual inspection, automated testing, process monitoring, and statistical analysis to maintain consistent production quality.