Kontrolliliitokset

Kontrolliliitokset, also known as control limits, are statistical boundaries used in quality control and process management to determine whether a process is in a state of statistical control. They are typically set at a certain number of standard deviations above and below the process mean. The most commonly used control limits are the upper control limit (UCL) and the lower control limit (LCL), which are usually set at plus or minus three standard deviations from the mean, respectively. These limits help identify when a process may be producing results that are not consistent with its normal behavior, indicating potential issues such as special causes of variation or shifts in the process mean. By monitoring data within these control limits, organizations can maintain the quality and consistency of their products or services, and take corrective action when necessary. The use of kontrolliliitokset is a fundamental concept in statistical process control (SPC) and total quality management (TQM).