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Clicking the Cc button displays a popup menu shown to the
right for automatically entering various equations into the
Average Delta Upper and Average Delta Lower edit boxes
including equations to specify a Cc of 1/4, 1/3 and 1/2, and
a +/- 1.5 standard deviation operating window. There is
also a menu item to specify a Cc value. This menu item
inserts equations for the Average Delta Upper and Average
Delta Lower with an 'X' at the place to insert the value of Cc. Finally, there is a menu item to
specify Six Sigma quality which sets the tolerance type to process, Cp = 2 and Cc = 1/4.
Optimizations Options for Target Group Box
The group box is used to specify options for performing an optimization per the Find
Optimal Targets dialog box covered in Section 6.1. The values entered do not affect the
current design including the Capability Study and Pareto Chart windows.
The Minimum and Maximum Target edit boxes are used to specify limits for the target.
They must be constant expressions. The minimum must be less than or equal to the
maximum. There may be further restrictions depending on the distribution selected.
Optimizations, effects tables and plots are all performed over the region specified by the
minimum and maximum targets. The minimum and maximum may represent physical or
practical limits. In event that a response surface study was used to obtain equations for the
outputs, the minimum and maximum targets should be no wider than the region of study.
When the Include in Optimizations check box is checked, the target for this input will
change when an optimization is performed using the Find Optimal Targets dialog box.
When unchecked, the target for the input is not optimized. By default it is checked. Certain
targets may not be adjustable in which case the check should be removed. Other inputs may
have preferred values. By setting the input to its preferred value and removing the check, the
product/process can be optimized for the preferred setting and the results compared to the
overall optimum.
The dial control that appears in this group box shows the position of the target in the interval
determined by the minimum and maximum targets. It can also be used to change the current
target by double clicking on the desired value.
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Chapter 4