Description Central composite designs Author(s) References See Also

This GUI covers classical response surface designs (central composite and Box-Behnken) as well as so-called latin-hypercube samples for factors that can and should be set to many different levels. This help file is about when to apply which of these.

Central composite designs can be generated from scratch or as an extension to
2-level full or fractional factorials generated with the 2-level dialogue
or with function `FrF2`

.
Their rationale is explained `here`

.
They usually have five different levels per experimental factor.

Box-Behnken designs have only three levels for each factor. They are explained
`here`

. They can not be generated by augmenting
an existing design.

Latin hypercube designs - if used with optimization which is strongly recommended -
try to fill the experimental space with points in an efficient way. Note that they are
NOT trying to optimize the design w.r.t. a specific statistical model.
Such optimal plans are available outside the R Commander with package `AlgDesign`

.
Simple versions of these have already been implemented into the R Commander.

Ulrike Groemping

Box G. E. P, Hunter, W. C. and Hunter, J. S. (2005)
*Statistics for Experimenters, 2nd edition*.
New York: Wiley.

See Also `ccd.design`

and `ccd.augment`

for the functions behind the central composite designs,
`bbd.design`

for the function behind the Box-Behnken designs,
and `lhs.design`

for the function behind the latin hypercube samples.

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