Goal Plot

The Goal Plot shows, for each variable, the spec-normalized mean shift on the x-axis, and the spec-normalized standard deviation on the y-axis. It is useful for getting a quick, summary view of how the variables are conforming to specification limits. Hold your cursor over each point to view the variable name. The Goal Plot red triangle menu has the following commands:

Shade CPK Levels

Shows or hides the CPK level shading.

Goal Plot Labels

Shows or hides the labels on the points.

Defect Rate Contour

Shows or hides a contour representing a specified defect rate.

Goal Plot shows the Goal Plot for the entire data set for the Semiconductor Capability.jmp sample data table after selecting Shade CPK Levels from the Goal Plot red triangle menu.

Goal Plot

For each column with LSL, Target, and USL, these quantities are defined as follows:

Mean Shift Normalized to Spec = (Mean(Col[i]) - Target) / (USL[i] - LSL[i])

Standard Deviation Normalized to Spec = Standard Deviation(Col[i])/ (USL[i] - LSL[i])

By default, the CPK slider and number edit box is set to CPK = 1. This approximates a non-conformance rate of 0.0027, if the distribution is centered. The red goal line represents the CPK shown in the edit box. To change the CPK value, move the slider or enter a number in the edit box. Points on the plot represent columns, not rows.

The shaded areas are described as follows, with C representing the value shown in the CPK edit box:

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Points in the red area have CPK < C.

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Points in the yellow area have C < CPK < 2C.

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Points in the green area have 2C < CPK.

JMP has a preference for plotting PPK instead of CPK. When this is on, the slider is labeled with PPK. You can change the preference at File > Preferences > Platforms > Capability.