Final answer:
When an employee complains about unfair treatment by the supervisor, the HR department should listen, investigate, and approach the situation professionally. Legal discrimination should be considered, but the focus should be on problem-solving and respectful resolution.
Step-by-step explanation:
When an employee complains about unfair treatment by the supervisor, it should be handled in a professional and appropriate manner. The HR department should listen to the employee's concerns and investigate the situation to determine if illegal discrimination may be occurring. However, it is important to approach the situation calmly and respectfully, focusing on problem-solving rather than placing blame. If the issue cannot be resolved internally, the employee may consider notifying higher management or seeking legal assistance.