In Release 6.12 and previous releases of SAS/QC software, the keyword GRAPHICS was required in the PROC SHEWHART statement to specify that the chart be created with a graphics device. In Version 7, you can specify the LINEPRINTER option to request line printer plots.
In Release 6.09 and in earlier releases, it is also necessary to specify the READLIMITS option to read control limits from a LIMITS= data set.
In Release 6.09 and in earlier releases, it is necessary to specify the READLIMITS option.
This discussion also applies to the use of subgroup-variables in the CUSUM procedure and the MACONTROL procedure.
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