Emphasis on the connection between the experiment and the model that the experimenter can develop from the results of the experiment.

Inclusion of material on computer output and computer graphics.

Coverage of experiments with random factors.

Emphasis on the integration of computer usage – The sixth edition includes output from two software products, Minitab and Design Expert.  Student versions of Design Expert and Minitab are available with this text.

Increased emphasis on factorial and fractional factorial design, including new analysis techniques.

Organization – Parts of the text are condensed in an effort to introduce students to the important topics on factorial designs more efficiently.

Discussions of selection transformations and alternatives such as the generalized liner model are included.