controlestroomgrafiek

A control chart, also known as a control chart or controlestroomgrafiek in Dutch, is a statistical process control tool used to determine whether a manufacturing process is in a state of statistical control. It is a type of chart used to study how a process changes over time. Data are plotted in time order. A control chart always has a central line that represents the average of the sample means, and upper and lower control limits that are determined from the process capability. These control limits are typically set at three standard deviations from the central line. If the process variation remains within these limits, it is considered to be in a state of statistical control. If the process variation exceeds these limits, it may indicate that the process is out of control and requires investigation and corrective action. Control charts are widely used in quality control and process improvement to monitor and improve the consistency and stability of a process. There are several types of control charts, including the X-bar and R chart, the p-chart, the c-chart, and the u-chart, each suited to different types of data and process characteristics.