A financial services company has been using the same software system for 10 years and employees have grown very accustomed to using this system. The employees are hard-working but very resistant to change. When word leaks out that management is considering a switch to a completely new software system, the employees become very upset as a new system will require a tremendous amount of training and hard work. Management determines that a new system is necessary in order to remain competitive but is concerned about the difficulty in dealing with employees who are so resistant to any type of change. Explain which organizational change model would be most suited for this.