Organization development (OD) is the study and implementation of practices, systems, and techniques that affect organizational change. The goal of which is to modify an organization's performance and/or culture. The organizational changes are typically initiated by the group's stakeholders. OD emerged from human relations studies in the 1930s, during which psychologists realized that organizational structures and processes influence worker behavior and motivation. More recently, work on OD has expanded to focus on aligning organizations with their rapidly changing and complex environments through organizational learning, knowledge management, and transformation of organizational norms and values. Key concepts of OD theory include: organizational climate (the mood or unique “personality” of