RESUMEN
This paper describes how the Collective Impact framework facilitated the design, implementation and development of a quality improvement initiative aimed at changing the way healthcare is provided to older adults living with mental health, addictions, neurocognitive and behavioral issues in southwestern Ontario. By promoting a common agenda, shared measurement systems, mutually reinforcing activities, continuous communication and with leadership from a backbone organization, system-wide change occurred. Outcomes, operational/strategic, clinical, capacity enhancement and community support structures as well as challenges are discussed. Improved coordination with primary care will further support enhanced clinical activities and capacity development strategies. Large-scale, multisectoral change is possible when aligned with a collaborative, problem-solving framework that promotes the commitment of many service providers/agencies to a common agenda.