Abstract A survey of the »change management literature« shows numerous prerequisites for a successful change, but reveals very little a bout how it can be achieved. If such prerequisites are not included in a change program, the change process will be encountered by what is often termed »resistance to change«, and ended in failure and frustration. Some scientists and practitioners argue that there is utility in resistance, but lack of change management models and theories actually impede to use the resistance advantages. »The Theory of Constraints (TOC)« is one of the theories views resistance as a necessary and positive element in any change process, arguing that managers need to identify resistance and use it to test and hone change strategies and action plans, to acheive a full and successful change implementation. The purpose of this article is to briefly describe TOC and its application in change menagement Also how to identify the various types of resistance against change and how to control them is described and handled within the framework of TOC Finally, by using thinking process tools of this theory, the utilizing model of behavior change is designed.