A Multi-objective Model for Ergonomic Workforce Scheduling with Bi Hazard Considerations

This paper presents a multi-objective model for solving ergonomic workforce scheduling with considered bi hazard exposure in the workplace. Most ergonomic workforce scheduling problems (WSPs) are concerned with single ergonomics hazard exposure when developing work schedules for workers to prevent their daily hazard exposures from exceeding a permissible limit. The two kinds of hazard types are considered, called constant- and variable-limit hazard. A mathematical model for multi-objective is developed as a MIP model. The objective is to determine optimal daily rotating work schedules, which considers two objective functions. Both objective functions intend to minimize the maximum hazard exposure among workers. A numerical example that considers the workplace with noise and physical workload hazard is presented and solved by CPLEX. The result yields the optimal solution for both single and multi-objective model.