The factors that affect a company's S$/$Q rating by the International Footwear Federation include

the size of incentive bonuses paid to workers for defect$-$free workmanship and the percentage use of refurbished footwear$-$making equipment.

the amount the company spends to properly, maintain the performance of footwear$-$making equipment. current and cumulative spending for TQM$/$Six Sigma quality control programs

how much is spent to inspect newly$-$produced pairs and avoid shipping defective shoes and the size of the footwear quality incentives paid to production workers.

the current$-$year number of innovative new performance features built into a company's branded models$/$styles$.$