What is the function of a control chart in manufacturing?

A control chart serves a critical function in manufacturing by monitoring and controlling processes through the analysis of statistical data. This tool allows manufacturers to visualize variations in a process, helping to identify trends, shifts, or anomalies that may indicate a potential issue. By plotting data points over time against predefined control limits, operators can distinguish between common cause variation, which is inherent to the process, and special cause variation, which can be attributed to specific changes or disruptions.

The primary goal of using control charts is to maintain process stability and to ensure that products meet quality standards consistently. Through this monitoring, businesses can make informed decisions about process adjustments before defects or inefficiencies escalate, leading to improved product quality and reduced waste. Thus, control charts are essential for quality control and continuous improvement initiatives within manufacturing operations.