This is true for Release 6.10 and later releases of SAS/QC software. For Release 6.09 and earlier releases, the procedure calculates control limits from the data unless you specify a LIMITS= data set in the procedure statement and you specify either the READLIMITS option or the READINDEXES= option in the chart statement. The NOREADLIMITS option is not available for Release 6.09 and earlier releases. For more information, see the entry for the READLIMITS option.

For details about computing control limits from the data, see the entry for the NOREADLIMITS option.

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