This document explains the end-to-end process of data management within Dementias Platform UK (DPUK). The policy describes the obligations on the involved parties. DPUK uses the UK Secure eResearch Platform (UKSeRP) informatics architecture, and references to DPUK data management are made in the context of UKSeRP policies and practices. This policy, along with those for data access and cost recovery, support a wider aim of DPUK which is to reduce the transaction costs of accessing and analysing cohort data.