Standard Orthogonal arrays Maximum Maximum Number of Columns Orthogonal Number of Number of at These levels Arra R Factors 3 4 LLL 8 3741 4 L L 5 237-151 LLLL 9266852 863 6 32 L'32 32 23 L 36 16 12 LLLL 26 5668 63 63 64 Robust System Design mit 人 16881
Standard Orthogonal Arrays Orth o gon al Array Nu mber of Ro ws Maxim um Number of Fact ors M aximum N u mb er of Columns at T hese L e v els 2 3 4 5 L4 4 3 3 - - - L8 8 7 7 - - - L9 9 4 - 4 - - L12 12 11 11 - - - L16 16 15 15 - - - L’16 16 5 - - 5 - L18 18 8 1 7 - - L25 25 6 - - - 6 L27 27 13 1 13 - - L32 32 31 31 - - - L’32 32 10 1 - 9 - L36 36 23 11 12 - - L’36 36 16 3 13 - - L50 50 12 1 - - 11 L54 54 26 1 25 - - L64 64 63 63 - - - L’64 64 21 - - 21 - L81 81 40 - 40 - - Robust System Design 16.881 MIT
Difficulty in Changing Levels Some factor levels cost money to change Paper airplane Other examples? Note: All the matrices in appendix c are arranged in increasing order of number of level changes required (left to right) Therefore, put hard to change levels in the leftmost columns Robust System Design mit 人 16881
Difficulty in Changing Levels • Some factor levels cost money to change – Paper airplane – Other examples? • Note: All the matrices in Appendix C are arranged in increasing order of number of level changes required (left to right) • Therefore, put hard to change levels in the leftmost columns Robust System Design 16.881 MIT