Mlesd DoE Techniques Overview 16888 ES077 TECHNIQUE COMMENT EXPENSE ( levels, n=# factors Full factorial Evaluates all possible in -grows design designs exponentially with number of factors Orthogonal arrays Dont always seem to Moderate-depends work -interactions? on which array One at a time Order of factors?1+n(l-1)-cheap Latin hypercubes Not reproducible, 1-cheap poor coverage if divisions are large Parameter studyCaptures no 1+n(l-1)-cheap interactions o Massachusetts Institute of Technology-Prof de Weck and Prof Willcox Engineering Systems Division and Dept of Aeronautics and Astronautics9 © Massachusetts Institute of Technology - Prof. de Weck and Prof. Willcox Engineering Systems Division and Dept. of Aeronautics and Astronautics DoE Techniques Overview Techniques Overview TECHNIQUE COMMENT EXPENSE (l=# levels, n=# factors) Full factorial design Evaluates all possible designs. ln - grows exponentially with number of factors Orthogonal arrays Don’t always seem to work - interactions? Moderate – depends on which array One at a time Order of factors? 1+n(l-1) - cheap Latin hypercubes Not reproducible, poor coverage if divisions are large. l - cheap Parameter study Captures no interactions. 1+n(l-1) - cheap