The Average Chart in the Measurement Systems Analysis platform plots the average measurement values for each combination of the part and X variables. This chart helps detect product variation despite measurement variation. In an Average Chart, out of control data is desirable because it indicates the ability of the measurement system to detect part-to-part variation.
The Average Chart red triangle menu contains the following options:
Show Grand Mean
Shows or hides the overall mean of the Y variable on the chart.
Show Connected Means
Shows or hides lines connecting the average measurement values.
Show Control Limits
Shows or hides lines representing the Upper Control Limit (UCL) and the Lower Control Limit (LCL) and labels those values. The control limits for the Average Chart use the same calculations as an XBar control chart. See “Statistical Details for XBar and R Charts”.
Show Control Limits Shading
Shows or hides shading between the UCL and LCL.
Show Separators
Shows or hides vertical lines to delineate the X variables.
Show Data
Shows or hides the data points on the chart. The y-axis rescales as needed to show all data points.
Tip: You can replace variables in the Average Chart in one of two ways: swap existing variables by dragging and dropping a variable from one axis to the other axis; or, click a variable in the Columns panel of the associated data table and drag it onto an axis.