Process Variables

~process~

All process variables report values based on process control statistics for the most recent process baseline. A process variable will return values from the most recent process in the DataSet. If you wish your process variables to display data from a process other than the most recent process in the DataSet, you should create a new DataSet in which the process you want to display is the most recent process.

~process,cp~

Capability or potential of the process baseline. The ratio of the specification width to the width of the normal distribution. Cp is normally calculated using an estimated standard deviation formula that uses either the mean of subgroup ranges or the mean of subgroup standard deviations with constant table values relative to the subgroup size.

~process,cpk~

Capability of the process baseline index relative to dispersion and centeredness. From the true process center (), Cpk indicates the closest specification limit (in terms of estimated standard deviation units/3).

~process,cr~

Capability ratio using the process baseline. The reciprocal of Cp.

~process,cpm~

Capability of the process baseline index influenced by the difference between the sample mean and the nominal target value.

~process,pp~

The process baseline performance index relative to dispersion. A ratio of the specification width to the width of the normal distribution. Pp is calculated using calculated or sample population standard deviation.

~process,ppk~

The process baseline performance index relative to dispersion and centeredness. Ppk is calculated using calculated or sample population standard deviation.

~process,nom,[char]~

Returns the value of the nominal within the process baseline for a specified characteristic.

~process,nom,[char],rel~

Returns the value of the relative nominal within the process baseline for a specified characteristic.

~process,nom,[char],abs~

Returns the value of the absolute nominal within the process baseline for a specified characteristic.

~process,mean~

Mean (average) of valid values within a data set row for the process baseline.

~process,stddev~

Calculated standard deviation of a row, for the process baseline.

~process,stddevest~

Estimated standard deviation of a row, for the process baseline.

~process,stddevtarget~

A measure of the spread of the data used in the denominator of the CPM calculation for the process baseline.

~process,xbarbar~

Returns the X Double Bar value.

~process,rbar~

Returns the R Bar value.

~process,sbar~

Returns the S Bar value.

~process,mabar~

Returns the MA Bar value.

~process,mrbar~

Returns the MR Bar value.

~process,lsl~

Lower specification limit for the process baseline. The lower engineering limit specified for a measurement.

~process,usl~

Upper specification limit for the process baseline. The upper engineering limit specified for a measurement.

~process,subsize~

Returns the subgroup size for the process baseline.

~process,effdates~

Returns the effective dates for the process baseline.

~process,effdate~

Returns the effective date of the process.