The widespread process of modernisation underway in contemporary UK health and social care agencies is leading to a series of organisational changes, including the formation of new agencies and the integration of existing services. Despite this, insufficient attention is often paid to organisational development (OD) interventions in the process of change, with national policy makers and local managers simply assuming that these new and integrated organisations will be effective without these interventions. Against this background, this module critically examines the definitions and processes of OD from diagnosis through intervention to review. It introduces, critiques and assesses the impact of the main frameworks which underpin contemporary OD practice in health and social care. Key frameworks include collaboratives and PDSA (Plan-Do-Study-Action) cycles; organisational learning theory; critical appreciative inquiry; psychodynamic approaches; emergence, chaos and complexity theories; and organisational discourse. The module will also draw on lessons from the literature on OD within the private sector and will explore a number of tools for change which are becoming common in the literature/discuss their relevance to health and social care settings.