This book introduces longitudinal co-creation, a methodology that supports the instigation and shaping of social, practice and policy interventions while simultaneously charting how these processes capture outcomes and impacts. It outlines the key conceptual and methodological foundations for qualitative longitudinal research and co-creation, and illustrates them through a detailed case study – the repeat instigation of the Young Dads Collective impact initiative. Featuring insights from multiple waves of interviews with the co-creation team and local community actors, it also explains the process and outcomes of the longitudinal co-creation model in new practice, policy and place-based contexts.

Throughout, Longitudinal Co-creation explores how the methodology's wider applications bring with them the potential for evidence-driven innovation and impact beyond the lifetime of individual research processes. It also sets out the key challenges of this research methods, and how they can be tackled both through possible solutions, and a broader use of reflexive approaches. This is an indispensable guide to for anyone who wants to use longitudinal co-creation in their own research and collaborative work, to innovate and adapt new or existing services that address community needs.