Standard response surface designs available in ECHIP are: linear with center point, quadratic, central composite in cube, central composite in sphere and cubic.
Standard outputs from ECHIP are the effects table, contour plot and 3D graphics.
Table 1 shows the design generated by ECHIP for the four variables.
The resulting data were inputed into the ECHIP program.
The response surface methods used in ECHIP software allow the experimenter to vary a number of inputs at once, using computer-determined levels for each experiment.
In this case, the resulting three-dimensional "response surface" produced by ECHIP [Fig.
ECHIP prescribes the experiments to be run, and then identifies which of the many variables that are important, and which are not.