Clearly, organizational development (OD) has changed over the past 80 years. Take this time to describe the origination of OD and the purpose of its creation. Explain how OD has changed and the reasons for the change. Provide an analysis of OD values and ethics, and their importance to OD credibility. To recap: Describe the origination of OD and the purpose of its creation. Explain how OD has changed during the past 80 years and the reasons for the change. Analyze OD values and ethics, and their importance to OD credibility.