Quality Control Charts | Vibepedia

Quality control charts (QCCs) are graphical tools used to study how a process changes over time. These charts plot data points representing process measurements against time, establishing upper and lower control limits derived from historical data. By distinguishing between common cause (random) variation and special cause (assignable) variation, QCCs enable engineers and managers to identify when a process is out of statistical control and requires intervention. This visual method is fundamental to statistical process control (SPC), a cornerstone of modern manufacturing and service industries, aiming to reduce defects, improve consistency, and enhance overall product or service quality. Their application spans from automotive assembly lines to healthcare diagnostics, providing a critical lens for continuous improvement.