Change ManagementChange management according to many becomes essential for the following reason: external pressure; which can encompass competition, new technologies, costs and regulatory changes. Additionally, economic and social conditions can intensify necessary changes in the long term. This article will discuss several aspects of change management models, theories and their applications. Additionally, it will provide insight into the drivers of change, factors needed to successfully implement change, management strategies and expectations, and leadership styles necessary for influence and effectiveness. Kurt Lewin's three-phase model of change is described as unfreezing, moving or changing, and refreezing. In simplified terms for most applications, this means allowing the current processes and procedures to be less constrained, then making adjustments to the new vision or processes and procedures, finally putting in place new constraints for the new processes and procedures ( McShane, 2003). .)The Burke-Litwin model of organizational performance and change is based on the idea that theorizes the need to explore organizational functioning and organizational change. This theory is highlighted by describing how performance is affected and how change is effective. Moreover, both in terms of content and coincidence with the processes emphasizing the transformational and transactional changes to be made, they are given value. Further breakdown includes how transformational change occurs in response to the external environment and its effects on the organization's mission and strategy, the organization's leadership and its culture. In turn, the transactional factors are the affected structural systems, management...... middle of paper ...... Soft skills: change management tools. Interfaces. Retrieved December 9, 2004, from the University of Phoenix Apollo Library's Infotrac Host database at http://www.apollolibrary.comMcShane, S. (2002.) Organizational Behavior, 2nd edition. McGraw-Hill Companies.Organizational Development Network Retrieved December 10, 2004 from http://www.odnet.org/toolkit/.phpSligo, F. (2001). Managing strategic change: technical, political and administrative. The Journal of the American Academy of Business. Retrieved December 8, 2004, from the University of Phoenix Apollo Library EBSCO Host Database at http://www.apollolibrary.comWeymes, E. (2003). It’s relationships, not leadership, that sustain successful organizations. Journal of Change Management. Retrieved December 7, 2004, from the University of Phoenix Apollo Library Proquest Host database at http://www.apollolibrary.com