ECHIPEverett Community Health Improvement Partnership (Somerville, PA)
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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.
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.
ECHIP has special designs for experiments in which the proportions of ingredients are to be studied.