the size of the incentive payment per non$-$defective pair produced, per pair spending for TQM$/$Six Sigma quality control efforts, the number of models$/$styles comprising the company's product line, and the installation of production improvement upgrade option A$.$

the S$/$Q rating of the pairs being produced, the percentage use of superior materials, per worker expenditures for best practice training, and the installation of production improvement option C$.$

per worker expenditures for best practices training, the number of models$/$styles being produced, the number of hours of overtime pay production workers receive, and whether the production facility has installed production improvement option D$.$

the size of worker's annual base pay, year$-$end incentive bonuses, the number of hours of overtime pay, the S$/$Q rating of the pairs being produced, and the number of models$/$styles comprising the company's product line.

the size of production workers' total compensation package, the percentage use of superior materials, and the S$/$Q rating of the pairs being produced.