Apply Default Rules Functions to a Shewhart Control Chart.
DESCRIPTION:
Returns the indices of all the points which are beyond the control limits or for which run.length or more consecutive points lie on one side of center line of a Shewhart control chart.
USAGE: 
shewhart.rules(object, run.length=8)
REQUIRED ARGUMENTS:
object:
an object of class "shewhart". Usually the return object of a call to the shewhart function.
OPTIONAL ARGUMENTS:
run.length:
the minimal length of runs you want to detect.
VALUE:
a list with two components a follows:
beyond.limits:
contains the indices of the points which are beyond the control limits.
runs:
contains the indices of the points for which run.length or more consecutive points lie on one side of center line of the Shewhart control chart defined by object.
SIDE EFFECTS:
By default shewhart.rules is applied to a Shewhart control chart and all the violating points are highlighted.
DETAILS:
shewhart.rules simply applies beyond.limits and runs.target and returns a list of all points which violate either of these rules.

shewhart.rules may be applied directly to an object inheriting from class "shewhart" to obtain a list containing the indices of points beyond the control limits and those violating the runs rule.

SEE ALSO:
shewhart , beyond.limits , runs.target
EXAMPLES: 
qc.chart <- shewhart(qcc(matrix(rnorm(100),ncol = 5), "xbar"))
shewhart.rules(qc.chart)