What is the lesson learn from OD approach Lesson Learned from OD Approach?

"Organization Development (OD) is a change effort that is carried out in a participative way, involving those affected by the change, and that uses action research as a key roadmap for the change" (Rothwell, 2012, p. 276).

Action Research is representative approach and process, which serves as a model for most OD interventions. Please post your lesson learned from OD approach.