Final answer:
The National Incident Management System defines 'Command' as the act of directing or controlling within an organization based on clear authority. This concept is similar to how a hierarchy of authority functions in any bureaucratic organization, ensuring structural integrity and clear communication.
Step-by-step explanation:
The National Incident Management System defines "Command" as 'The act of directing, ordering, or controlling by virtue of explicit statutory, regulatory, or delegated authority'. This definition aligns with the concept of a hierarchy of authority, which ensures that there is a clear chain of command in an incident management organization. For instance, similar to how a shift manager at Walmart assigns tasks and reports to the store manager, and so on up the ladder, in an incident management context, each individual follows a clear line of authority, taking orders from and reporting to their designated superiors.