SPAN Subcommand (SPCHART command)

SPAN specifies the span from which the moving range for an individuals chart or process capability chart (when the data are specified in the form var) is calculated. The specification must be an integer value that is greater than 1. The default is 2. SPAN applies only to I, IR, and CPCHART chart specifications.

Example

SPCHART /IR=SUBSIZE /SPAN=5.

• The SPAN subcommand specifies that the moving ranges are computed from every five individual samples.