What are the management functions?

French industrialist Henri Fayol wrote that all managers perform five management functions: plan, organize, command, coordinate, and control. Today, it is condensed to four: planning, organizing, leading, and controlling.
Planning
a)      Defining an organization’s goals, establishing an overall strategy for achieving those goals, and developing a comprehensive hierarchy of plans to integrate and coordinate activities.
Organizing
a)      Includes the determination of what tasks are to be done, who is to do them, how the tasks are to be grouped, who reports to whom, and where decisions are to be made.
Leading
a)      Motivating employees, directing the activities of others, selecting the most effective communication channels, or resolving conflicts among members.
Controlling
a)      Monitoring the organization’s performance
b)      Actual performance must be compared with the previously set goals.
c)      Any significant deviations are corrected.