In this research, we are interested in better understanding the health and social services delivery experiences of Pacific families with complex needs. Services for this population are usually delivered by a large range of professionals working across different organisations. The fragmented service delivery that results can lead to major inconvenience, wasted resources, and poor health and social outcomes. More integrated care is seen as key to improving quality of care and health outcomes for service users, and to ensuring a much more efficient use of resources. This research will provide a greater understanding of social and cultural processes and practices that underpin Pacific families’ experiences of health and social services, how they experience fragmentation, and what is needed to enhance integrated health care and social services policy and delivery. It will also enhance the validity of Pacific worldviews and make a substantial contribution to the realist methodological literature in NZ.