Graphical Enhancements

Overview

This chapter provides details on the following topics:

displaying process data stratified into levels using a symbol-variable
displaying process data stratified into blocks using block-variables
displaying process data stratified into time phases using the READPHASES= option
displaying multiple sets of control limits using the READPHASES= and READINDEXES= options
displaying multivariate process data using star charts
displaying trends in process data
clipping extreme points to create more readable charts
labeling axes
selecting subgroups for computation and display

The options described in this chapter can be specified in all the chart statements available in the SHEWHART procedure.