1. Hierarchical model. The executives perform the role of high-level advisors to help
managers on a range of issues relating to human resources. It is also characterized by
several activities essentially administrative and other not so essential for the HR, such as
maintaining personnel files, purchasing airline tickets for executives, facility management
organization, etc. So that executives can be concern exclusively with the essential
business activities. Main contribution: support.
2. Professional model. It emphasizes the contribution of HRM in the relationship between the
organization and outside groups. Surging demand for an HR professional, high-level
responsible for negotiating with unions, governments and other groups, giving more
credibility to this work before the high dome of the organization, resulting in a higher
power in negotiating the interests of the area. Main contribution: professionalism.
3. Service delivery model. The study highlights the importance of improving the quality and
cost effectiveness of services provided to other organizational areas and internal
customer satisfaction, manage the area as if it were a business or a professional
consultancy services, seeking to coordinate the provision of services and satisfaction of
line managers. Main contribution: the delivery of services.
4. Partnership model. This fourth model of HRM is the evolutionary consequence of the other
three models. The study highlights the development of partnerships around the HR
practices in order to create value and increase competitiveness, requiring for this the
integration of HR with the managerial, operational units, external groups, consultants and
unions. Main contribution: align human resource management to business strategy
(adapted from Eisenstat, 1996).