Waste: Any activity that consumes resources and produces no added value to the product or service a customer receives.
Weighed voting: A way to prioritize a list of issues, ideas or attributes by assigning points to each item based on its relative importance.
Wescott, Mason E.: ASQ founder and Honorary Member. A professor emeritus at the Rochester Institute of Technology (RIT), Wescott has been teaching mathematics and statistics since 1925. He has taught at Northwestern University, Rutgers University and RIT, where the Wescott Statistics Laboratory was dedicated in his honor in 1984. Wescott succeeded Martin A. Brumbaugh as the editor of Industrial Quality Control in 1947, a position he held until 1961.
Whisker: From box plot, displays minimum and maximum observations within 1.5 IQR (75th to 25th percentile span) from either 25th or 75th percentile. Outlier are those that fall outside of the 1.5 range.
Wilcoxon Mann-Whitney test: Used to test the null hypothesis that two populations have identical distribution functions against the alternative hypothesis that the two distribution functions differ only with respect to location (median), if at all. It does not require the assumption that the differences between the two samples are normally distributed. In many applications, it is used in place of the two sample t-test when the normality assumption is questionable. This test can also be applied when the observations in a sample of data are ranks, that is, ordinal data rather than direct measurements.
Work force: The union and non union employees of an organization, as well as the labor union(s) where applicable. The term "work force" is generally used to describe non management employees, unless otherwise noted.
Work team: A team comprising members from one work unit. Also called a "natural team."
World-class quality: A term used to indicate a standard of excellence: best of the best.