Chain of command, unity of command, and span of control

        What is meant by the terms chain of command, unity of command, and span of control? What are the differences between policies and procedures and between rules and regulations (and what are some examples of each)? List and explain four of the six processes of, and barriers to effective communication can exist within a police organization? What are the roles of the police executive under the Mintzberg model of chief executive officers? Who is the Chief Law Enforcement Officer in Columbus, Ga?