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A class of designs for mixture experiments based on augmented pairs.

A class of designs for mixture experiments based on augmented pairs.
A class of designs for mixture experiments based on augmented pairs.
A class of three-level response surface designs involving augmented pairs, which has the property that the initial factorial set of runs and the set of augmenting runs are orthogonally blocked, as regards estimation of the linear and bilinear terms in a second-order model, is extended to the case where orthogonality applies additionally to the second-order square terms. The advantage of this is that orthogonally blocked mixture designs may be derived from these extended augmented response surface designs by projecting them into the restricted mixture simplex space. A general result for complete orthogonality using augmented full or fractionally replicated factorial designs is provided, and several illustrative examples of designs suitable for projection are used to demonstrate the method.
central composite designs, mixture ingredients, process variables, projections, response surface designs
0361-0926
911-919
Prescott, P.
cf0adfdd-989b-4f15-9e60-ef85eed817b2
Prescott, P.
cf0adfdd-989b-4f15-9e60-ef85eed817b2

Prescott, P. (2004) A class of designs for mixture experiments based on augmented pairs. Communications in Statistics: Theory and Methods, 33 (11), 911-919. (doi:10.1081/STA-200037934).

Record type: Article

Abstract

A class of three-level response surface designs involving augmented pairs, which has the property that the initial factorial set of runs and the set of augmenting runs are orthogonally blocked, as regards estimation of the linear and bilinear terms in a second-order model, is extended to the case where orthogonality applies additionally to the second-order square terms. The advantage of this is that orthogonally blocked mixture designs may be derived from these extended augmented response surface designs by projecting them into the restricted mixture simplex space. A general result for complete orthogonality using augmented full or fractionally replicated factorial designs is provided, and several illustrative examples of designs suitable for projection are used to demonstrate the method.

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More information

Published date: 2004
Keywords: central composite designs, mixture ingredients, process variables, projections, response surface designs
Organisations: Statistics

Identifiers

Local EPrints ID: 30007
URI: http://eprints.soton.ac.uk/id/eprint/30007
ISSN: 0361-0926
PURE UUID: 4a24176b-1ffa-4098-9f75-514cb2decc12

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Date deposited: 11 May 2006
Last modified: 15 Mar 2024 07:36

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