Organization development (OD) is a deliberately planned, organization-wide effort to increase an organization's effectiveness and/or efficiency. OD theorists and practitioners define it in various ways. Its multiplicity of definition reflects the complexity of the discipline and is responsible for its lack of understanding. For example, Vasudevan has referred to OD being about promoting organizational readiness to meet change. OD is a systemic learning and development strategy intended to change the basics of beliefs, attitudes and relevance of values, and structure of the current organization to better absorb disruptive technologies, shrinking or exploding market opportunities and ensuing challenges and chaos. It is worth understanding what OD is not. It is not training, personal development, team development, HRD (human resource development), L&D (learning and development) or a part of HR although it is often mistakenly understood as some or all of these. OD interventions are about change so involve people - but OD also develops processes, systems and structures. The primary purpose of OD is to develop the organization, not to train or develop the staff.