1 In
the Create Response Surface Design dialog box, click Designs.
2 Do
one of the following, then click OK.
· To
set a equal to 1, choose Face Centered.
When a = 1, the axial points are placed on the
"cube" portion of the design. This is an appropriate choice
when the "cube" points of the design are at the operational
limits.
· Choose
Custom
and enter a positive number in the box. A value less than one places the
axial points inside the "cube" portion of the design; a value
greater than one places the axial points outside the "cube."
|
Note |
A value of a = (F)**1/4, where
F is the number of factorial points in the design, guarantees rotatability. |
To change the default value of a