Kurt Lewin's model of change management proposes that change occurs in three steps: unfreezing, changing, and refreezing. While some have criticized Lewin for oversimplifying change, his model remains foundational. Lippitt later expanded on Lewin's work by proposing a seven phase model of change that includes increasing awareness of the need for change, establishing change objectives, making adjustments, and accepting new stability. Nursing often involves complex changes on multiple levels to address critical patient issues. Referring to change management theories can help increase the success of changes in healthcare practice.