1) This thesis explores the impact of implementing a Lean Management System in the pharmacy department of a large New Zealand public hospital in order to transition from a supply-driven model to one focused on medicines optimization.
2) Participatory Action Research was used to examine the themes of "Relevance" and "Reactivity" before, during, and after the Lean Management System introduction. Data was collected through focus groups, interviews, and reflections.
3) The findings indicate that the Lean Management System had a positive impact on sustainability of change by increasing individual relevance to the pharmacy department and reducing daily reactivity, though this impact was not consistent across all teams. The success also depended on leadership behaviors.