What should be done before interrogating an employee regarding a complaint?

The most appropriate action to take before interrogating an employee regarding a complaint is to conduct a preliminary investigation. Engaging in a preliminary investigation allows the supervisor or investigator to gather pertinent information, understand the context of the complaint, and determine the necessary details that will help in conducting a fair and thorough interrogation.

This initial step is crucial as it ensures that the interrogation is guided by facts and the relevant circumstances are known, leading to a more effective resolution process. It also helps in identifying if there are any witnesses or additional documents that are needed, as well as clarifying what specific aspects of the complaint need to be addressed during the interrogation.

While notifying the union representative, waiting for a specific duration, or informing the employee of their rights may play roles in employee interactions or legal considerations, they do not provide the foundational step of understanding the situation fully before taking further actions in the interrogation process. Thus, conducting a preliminary investigation is the essential first step in managing complaints effectively within the workplace.