[영문]The concept of co-production ? also called co-creation ? is gaining widespread attention as a way to increase user involvement in service provision in the UK. It is usually taken as self-evident that more co-production will improve services. However, it is necessary to be clear about how far and in what ways co-production can improve public services. This article looks at the purported advantages of co-production, and considers how these can best be accessed. A case study workshop involving social housing users and providers, conducted as part of the National Consumer Council-Unison Shared Solutions project, is used to illustrate the need for collective dialogue and deliberation between co-producers rather than purely transactional forms of co-production.