Which of the following is not among the factors that affect worker productivity?

Whether the S$/$Q rating of the branded private$-$label footwear being produced by workers is above or below $5\mathrm{.}0$ stars.

Expenditures for best practices training per worker

The number of models workers must assemble at a given production facility

The percentage increase in annual base pay

How favorably the total annual compensation of workers compares to industry$-$average total compensation levels at production facilities in the same region