Models
Leadership Models
Leadership models help us to understand what makes leaders act the way they do in certain situations. The ideal is not to lock yourself in to a type of behavior discussed in the model, but to realize that every situation calls for a different approach or behavior to be taken. Two models will be discussed, the Four Framework Approach and the Managerial Grid.
In the Four Framework Approach, Bolman and Deal (3)   suggest that leaders display leadership behaviors in one of four types of frameworks: Structural, Human Resource, Political, or Symbolic. The style can either be effective or ineffective, depending upon the chosen behavior in certain situations.   
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Structural Framework - In an effective leadership situation the leader is a social architect whose leadership style is analysis and design. In an ineffective leadership situation the leader is a petty tyrant whose leadership style is details. Structural Leaders focus on structure, strategy, environment, implementation, experimentation, and adaptation.
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Human Resource Framework - In an effective leadership situation the leader is a catalyst and servant whose leadership style is support, advocate, and empowerment. In an ineffective leadership situation the leader is a pushover, whose leadership style is abdication and fraud. Human Resource Leaders believe in people and communicate that belief; they are visible and accessible; they empower, increase participation, support, share information, and move decision making down into the organization.
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Political Framework - In an effective leadership situation the leader is an advocate, whose leadership style is coalition and building. In an ineffective leadership situation the leader is a hustler, whose leadership style is manipulation. Political leaders clarify what they want and what they can get; they assess the distribution of power and interests; they build linkages to other stakeholders; use persuasion first, then use negotiation and coercion only if necessary.
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Symbolic Framework - In an effective leadership situation the leader is a prophet, whose leadership style is inspiration. In an ineffective leadership situation the leader is a fanatic or fool, whose leadership style is smoke and mirrors. Symbolic leaders view organizations as a stage or theater to play certain roles and give impressions; these leaders use symbols to capture attention; they try to frame experience by providing plausible interpretations of experiences; they discover and communicate a vision.
This model suggests that leaders can be put into one of these four categories and there are times when one approach is appropriate and times when it would not be. Any one of these approaches alone would be inadequate. We should be conscious of all four approaches and not just rely on one. For example, during a major organization change, a structural leadership style may be more effective than a visionary leadership style; while during a period when strong growth is needed, the visionary approach may be better. We also need to understand ourselves as each of us tends to have a preferred approach. We need to be conscious of this at all times and be aware of the limitations of our favored approach.
The Blake and Mouton Managerial Grid (4)   uses two axis. "Concern for people" is plotted using the vertical axis and "Concern for task" is along the horizontal axis. They both have a range of 1 to 9. The notion that just two dimensions can describe a managerial behavior has the attraction of simplicity. These two dimensions can be drawn as a graph or grid:   
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Distribution of rĂ´les
McCann's and Margerison's work has produced the following data on a population of 3730 managers from the UK, the USA, Canada, Australia, New Zealand and South-east Asia:
Team rôle
Proportion(%)
Creator-innovator
9.2
Explorer-promoter
8.7
Assessor-developer
17.5
Thruster-organizer
26.5
Concluder-producer
26.7
Controller-inspector
7.5
Upholder-maintainer
1.7
Reporter-adviser
2.1
71% of the sample falls on the right of the Wheel since they have a common preference for organizing. However, as McCann points out, these people do not always have a natural capacity for listening and their general weakness in communication is responsible for failing to achieve a truly high performance. Further, a company which fails to listen to the creators and innovators can find itself in trouble in the long run.
Finally, it's well worth taking a look through the characteristics of the people on the Wheel, if you haven't done so already. See if you can recognize yourself and people you know.
From McCann ( 1985   )

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