Standard deviation is a statistical measure that quantifies the empt of variation or dissestion in a set of data point. In control chart design, it plays a crial role in monitoring process stability and consistency over time.

Co je to za Standarda Deviationa?

Standard deviation indicates how much individual data pons differ from tha average value. A low standardion supplements data point are close to te mean, while a high value indicates greater variability.

Význam in control Charts

Control charts use standard dexation to equisish control limits, which help determinate whether a process is operating normally or if there are signs of variation that need attention. These limits are typically set at three standard deviations approxe and below the process mean.

Kalkulating Control Limits

Te upper control limit (UCL) and lower control limit (LCL) are calculated using the process mean n and standard deviation:

  • UCL = Mean + (3 × Standard Deviation)
  • LCL = Mean - (3 × Standard Deviation)

Tyto limity help identifify unusual variations that may indicate a process is out of control.