The administration perspective is split up into two foremost components: classical advances and up to date approaches. "Many of these approaches developed simultaneously? and they often had a significant impact on one another. Some advances were a direct answer to the perceived deficiencies of preceding approaches. Others developed as the needs and issues confronting managers changed over the years." (Batman & Snell? 1996? 31) The evolution of leadership thought and action has also been divided in four eras according to level of the leadership works and the condition of the environment. "Great Man leadership" era? "Rational Management" era? ...