Queue Discipline refers to the rules or protocols that determine the order in which customers or items are served in a queue. Common types include First-Come, First-Served (FCFS), where the first person in line is served first, and Last-Come, First-Served (LCFS), where the most recent arrival is served first. Different queue disciplines can impact efficiency and customer satisfaction. For example, Priority Queuing allows certain customers, like those with special needs or higher status, to move ahead in line. Understanding these disciplines helps businesses manage service delivery effectively.