övervakningsdiagram

övervakningsdiagram is a Swedish term that translates to "monitoring chart" or "control chart" in English. It is a graphical tool used in statistical process control (SPC) to track and analyze the performance of a process over time. The primary purpose of an övervakningsdiagram is to detect variations or deviations from the expected behavior of a process, allowing for timely intervention and improvement.

These charts typically consist of a central line representing the average or target value of the process, along with upper and lower control limits. These limits are usually calculated based on historical data and represent the expected range of natural variation within the process. Data points representing measurements taken at regular intervals are plotted on the chart.

If a data point falls outside the control limits, or if a pattern of points suggests a non-random variation (e.g., a trend or a run of points on one side of the center line), it indicates that the process may be out of statistical control. This signals a need to investigate the potential causes of the variation, such as equipment malfunctions, changes in materials, or human error. By identifying and addressing these issues, organizations can improve process stability, reduce defects, and enhance product or service quality. övervakningsdiagram are widely used in manufacturing, healthcare, and various other industries.