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SPSS® 12.0 Command Syntax Reference

SPSS® 12.0 Command Syntax Reference

SPSS® 12.0 Command Syntax Reference

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1522 SPCHART<br />

fixed control limits are displayed. However, if you want only the specified control limits, you<br />

must edit the chart in a chart window to suppress the calculated series.<br />

Example<br />

SPCHART /TEMPLATE=’CTRL.CHT’<br />

/XS=SUBSIZE<br />

/USL=74.50<br />

/LSL=73.50.<br />

• The USL and LSL subcommands specify the control limits according to the designing engineer.<br />

The center line is most probably at 74.00.<br />

• The specified upper and lower limits are displayed together with the control limits calculated<br />

from the observed standard deviation and the sigma value.<br />

TARGET Subcommand<br />

This subcommand defines the target value used in computing CpM and PpM requested by<br />

the STATISTICS subcommand. The value may be any real number less than or equal to the<br />

USL value and greater than or equal to the LSL value.<br />

• This subcommand is silently ignored, if no applicable STATISTICS keyword is specified.<br />

• If the value is numeric but out of the valid range, we warn and ignore the CPM or/and PPM<br />

keyword(s), if any, in the STATISTICS subcommand.<br />

MISSING Subcommand<br />

MISSING controls the treatment of missing values in the control chart.<br />

• The default is NOREPORT and EXCLUDE.<br />

• REPORT and NOREPORT are alternatives and apply only to category variables. They<br />

control whether categories (subgroups) with missing values are created.<br />

• INCLUDE and EXCLUDE are alternatives and apply to process variables.<br />

NOREPORT Suppress missing-value categories. This is the default.<br />

REPORT Report and plot missing-value categories.<br />

EXCLUDE Exclude user-missing values. Both user- and system-missing values for the process<br />

variable are excluded from computation and plotting. This is the default.<br />

INCLUDE Include user-missing values. Only system-missing values for the process<br />

variable are excluded from computation and plotting.

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