Three – Skill Approach (Katz, 1955) The skill theory is growing up due to explicit fault in the Trait approach. The two primary theories to develop from a Skill approach were Katz’s three skill theory approach and Mumford’s skill model of leadership. The skills approach is the idea that a leader possesses certain abilities that enables he or she to serve as a leader (Pennsylvania State University, 2013). Robert Katz contributed the Three Skills Model: Technical, Human, and Conceptual (Pennsylvania State University, 2013). Technical skills are the knowledge and proficiency one has in a certain area (Northouse, 2012). Human skill is the ability to work with and relate to people (Northouse, 2012). “Conceptual skills are the ability to work with ideas and concepts” (Northouse, 2012). Effective leadership is the result of three skills, Based on field research in administration and his own firsthand observations of executives in th...