This document provides an overview of organization development (OD). It defines OD as a systematic, integrated approach to improving organizational effectiveness. The founding father of OD is identified as Kurt Lewin. Key aspects of OD discussed include its focus on planned intervention and use of behavioral science knowledge to increase organizational health. Characteristics of OD highlighted are that it takes a systematic approach to planned change and recognizes the reciprocal relationship between individuals and the organization. The objectives and strategies of OD are also outlined.