1947 – National Training Laboratories Founded
NTL in USA advances the research into applied behavioural sciences, develops understand of change agent role and experiential learning.
1950’s – Human Relations Movement
Growth of social and developmental psychology
1951 – Socio-Technical System Thinking (STS)
Tavistock Institute (UK) research shows that combining social factors with technological changes increases effectiveness, efficiency and moral.
1967 – Survey Research Methods
Likert and Mann pioneer survey feedback to help organisational leaders understand the impact they have on the people and performance of the organisation.
1968 – Creation of the T Group
Lewin (USA) and Tavistock Institute develops unstructured group laboratory training, and action learning sets.
1974 – OD as Planned approach to Change
Friedlander and Brown research OD as a method of planned change effort
1980’s – General Systems Theory
Neilsen and Schein promote OD as activities that influence the social processes within an organisation.
1997 – Organisational Effectiveness
Linking the application of OD in planned development interventions to the improvement of organisational effectiveness.
2000’s to Present – Complexity Theory
OD continues to be informed by new insights and research in a number of disciplines including natural sciences, biology and physics as well as developments in the social and behavioural sciences.