Design-Ease 6.0 from Stat-Ease, Inc. (Minneapolis) is an entry-level software package that makes it possible for beginning experimenters to improve their product or process through the use of experimental design tools. It features standard two-level and fractional factorials, general (multilevel) factorials (new), high-resolution irregular fractions, Taguchi orthogonal arrays (new), and Plackett-Burman designs.