The municipalities and the Regional Health Authorities in Central Norway have been assigned a mandate to implement a shared electronic health record, Helseplattformen, reflecting the visions set out in the national eHealth white paper ‘One Citizen - One Record’. This study identifies and describe anticipated benefit streams of clinical decision support in ‘One Citizen - One Record’ and the user requirement specification documents of Helseplattformen. This study found that the benefit stream of clinical decision support translates from the health policy visions stated in ‘One Citizen - One Record’ into Helseplattformen. However, business changes, although a critical element of achieving benefits, were not emphasised in either. This calls for the programme of Helseplattformen to pay careful attention to how the information system and information technology requirements must be accompanied by enabling changes as well as business changes in order to achieve the identified benefits of ‘One Citizen - One Record’ and Helseplattformen.