Organizational Development (OD) focuses on facilitating planned change to enhance effectiveness and adaptability in organizations, which often involves theories like Lewin's Change Model and Action Research Model. The planned change process follows structured steps, including entering- and-contracting, diagnosing, planning and implementing change, and evaluating outcomes, with OD practitioners playing crucial roles in this process. These practitioners, whether internal or external, must possess competencies in areas such as organizational behavior, group dynamics, and emotional intelligence to navigate the complexities of change effectively.