The article $$Multi$-$objective Scheduling Problems: Determination of Pruned Pareto Sets$($H$.$ Taboada and D$.$ Coit, IIE Transactions, $2008$:$552564)$ presents examples in a discussion of optimization methods for industrial scheduling and production planning. In one example, seven different jobs were performed on each of five machines. The cost of each job on each machine is presented in the following table. Assume that it is of interest to determine whether costs differ between machines, but it is not of interest whether costs differ between jobs.