FACTORS INFLUENCING USER INVOLVEMENT IN DSS PROJECT IMPLEMENTATION: SOME LESSONS FROM THE UNITED KINGDOM HEALTH SECTOR Nasirin, Syed, Thames Valley University, Wellington Street, Slough SL1 7NH, UK, snasirin1@acm.org Winter, Nancy, Thames Valley University, Wellington Street, Slough SL1 7NH, UK, nancyewinter@yahoo.com Coppock, Paul, Thames Valley University, Wellington Street, Slough SL1 7NH, UK, paul.coppock@tvu.ac.uk Abstract This paper presents two in-depth case studies on the user involvement factors considered by a hospital in the UK in implementing their Decision Support Systems (DSS) projects. The implementation of the systems had supported in the need to monitor clinical effectiveness of drug treatments patients with mental illnesses. The case studies have illustrated that individual’s eagerness had been the key factor to the success of the project despite its lack of formal project practices. Keywords: User involvement; DSS project; DSS project implementation; Health sector.