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IRCHART Statement |
Table 34.23: OUTLIMITS= Data Set
Variable | Description |
_ALPHA_ | probability () of exceeding limits |
_CP_ | capability index C_{p} |
_CPK_ | capability index C_{pk} |
_CPL_ | capability index CPL |
_CPM_ | capability index C_{pm} |
_CPU_ | capability index CPU |
_INDEX_ | optional identifier for the control limits specified with the OUTINDEX= option |
_LCLI_ | lower control limit for individual measurements |
_LCLR_ | lower control limit for moving ranges |
_LIMITN_ | number of consecutive measurements used to compute moving ranges |
_LSL_ | lower specification limit |
_MEAN_ | process mean |
_R_ | value of central line on moving range chart |
_SIGMAS_ | multiple (k) of standard error of individual measurement or moving range |
_STDDEV_ | process standard deviation ( or ) |
_SUBGRP_ | subgroup-variable specified in the IRCHART statement |
_TARGET_ | target value |
_TYPE_ | type (estimate or standard value) of _MEAN_ and _STDDEV_ |
_UCLI_ | upper control limit for individual measurements |
_UCLR_ | upper control limit for moving ranges range |
_USL_ | upper specification limit |
_VAR_ | process specified in the IRCHART statement |
The OUTLIMITS= data set contains one observation for each process specified in the IRCHART statement. For an example, see "Saving Control Limits" .
Given a process name that contains eight characters, the procedure first shortens the name to its first four characters and its last three characters, and then it adds the suffix. For example, the procedure shortens the process DIAMETER to DIAMTER before adding the suffix R.
A variable containing the moving ranges is created for each
process specified in the IRCHART statement.
For example, consider the following statements:
proc shewhart data=steel; irchart (width diameter)*lot / outhistory=summary; run;
The data set SUMMARY contains variables named LOT, WIDTH, WIDTHR, DIAMETER, and DIAMTERR.
Additionally, the following variables, if specified, are included:
For an example of an OUTHISTORY= data set, see "Saving Individual Measurements and Moving Ranges" .
Variable | Description |
_ALPHA_ | probability () of exceeding control limits |
_EXLIM_ | control limit exceeded on individual measurements chart |
_EXLIMR_ | control limit exceeded on moving range chart |
_LCLI_ | lower control limit for individual measurements |
_LCLR_ | lower control limit for moving range |
_LIMITN_ | number of consecutive measurements used to compute moving ranges |
_MEAN_ | process mean |
_R_ | average range |
_SIGMAS_ | multiple (k) of the standard error associated with control limits |
subgroup | values of the subgroup variable |
_SUBI_ | individual measurement |
_SUBR_ | moving range |
_TESTS_ | tests for special causes signaled on individual measurements chart |
_UCLI_ | upper control limit for individual measurements |
_UCLR_ | upper control limit for moving range |
_VAR_ | process specified in the IRCHART statement |
Notes:
For an example, see "Saving Control Limits" .
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