Classes

CChart is a c-chart for monitoring the count of the number of defects when defects are rare. Control limits are computed using the Poisson distribution. If defects are not rare NpChart should be used instead.

ControlLimit is a control limit line on a process control chart.

CuSum is a cumulative sum chart. It is more efficient than a Shewhart chart for detecting small shifts in the mean of a process.

CuSumStatus is a cumulative sum status chart. CuSumStatus plots the tabular CuSum results.

EWMA is an exponentially weighted moving average control chart.

NpChart is an np-chart for monitoring the number of defects when defects are not rare.

ParetoChart is a Pareto bar chart.

PChart is a p-chart for monitoring the defect rate when defects are not rare.

RChart is an R chart using sample ranges to monitor the variability of a process. Each sample must contain at least two observations. The range of a sample is the maximum observed value minus the minimum observed value.

SChart is an S chart using sample standard deviations to monitor the variability of a process. This is normally used with sample sizes greater than 10.

ShewhartControlChart is the base class for the Shewhart control charts.

UChart is a u-chart for monitoring the defect rate when defects are rare.

XbarR is an X-bar chart for monitoring a process using sample ranges.

XbarS is an X-bar chart for monitoring a process using sample standard deviations.

XmR is an XmR chart for monitoring a process using moving ranges.