Quality in Design 183
combinations at the corners� On this side of the cube, we can see that an
increase in levels of Factors A and B decreases the mowing time, and together
they reduce the mowing time even further� All this points to the corner with
theTreatment Combination ab, where the mowing time is 70 minutes� That
isthe best choice of parameter values, so the best choice of parameters would
be as follows: blade angle high, deck height high, and chute location low�
3.3.2.11 Model Building
One of the important aspects of post-experiment data analysis is model
building and exploring the factor-level space for optimal factor-level com-
binations that produce performances even better than those obtained in the
experimental tria ...