$i$	Number of personnel that is to enter assignment request to the software {1, …, n}
$j$	Number of shifts that can be preferred by the staff in the software (determined by the manager) {1, …, m}
$k$	Number of personnel assignment requests entered into the software {1, …, b}
$t$	The shift hour to be assigned in the software {1, …, s}
$l$	Number of units to work in the department {1, … r}
$\mathit{TST}$	Total staff working time
Additional different parameters in scheduling according to seniority score (SPM)
$T_i$	Total working time of $i$th personnel
$u$	Seniority score {0, …, 100}
Additional different parameters in scheduling personnel assignment percentages, being the most equitable/balanced and closest to each other (BFM)
$u_i$	Total working time of $i$th staff
$u_{\mathit{max}}$	Maximum seniority score in the software
$a$	Percentage of staff assignment
$\mathit{TPT}$	Total personnel working hours
Additional different parameters in genetic algorithm scheduling (GAM)
$h$	Mutation rate within the range of [0, 1]
$g$	Mutation rate entered into the software within the range of [0, 1]
$p$	Number of shifts in the software {1, …, c}
$P_i$	Objective function for maximum satisfaction of employee demands