Final answer:
The practice used by Hayfields' managers in training employees is known as job rotation, where employees are trained in various roles to ensure flexibility and continuity of operations.
Step-by-step explanation:
The managers at Hayfields, a restaurant chain, are employing the concept of job rotation in training their employees, where the trainees are prepared to step in and perform different roles within the organization. This comprehensive training ensures that the employees gain a wide range of skill sets required for various jobs, enabling the workforce to be versatile and well-equipped to maintain operations even when some staff members are absent. Job rotation is beneficial as it creates a flexible workforce and can potentially lead to higher productivity and profits, as well as better work-team collaboration within the company.