This style starts with the idea that team members agree to obey their leader when they accept a job.

Charismatic leaders inspire and motivate their team members. But they often focus on themselves and their own ambitions, and they may not want to change anything.

Often the most effective style to use. 

It shows you the best style to use, based on how capable people are of working autonomously, and how creative or "programmable" the task is.

• With a people-oriented style, you focus on organizing, supporting, and developing your team members. This participatory style encourages good teamwork and creative collaboration.
• With task-oriented leadership, you focus on getting the job done. You...

A "servant leader " is someone, regardless of level, who leads simply by meeting the needs of the team.

Means following rules rigorously, and ensure that their people follow procedures precisely.

Psychologist Kurt Lewin developed his framework in the 1930s, and it provided the foundation of many of the approaches that followed afterwards

With this, you can identify the best leadership approach to use, based on your people's needs, the task that they're doing, and the environment that they're working in.