Procurers, providers and users (PPU) : towards a meta-role model for conceptualising product-service in the built environment Siriwardena, ML, Rooke, JA, Koskela, LJ, Kagioglou, M, Mcdermott, P, Sexton, MG and Aouad, GF Title Procurers, providers and users (PPU) : towards a meta-role model for conceptualising product-service in the built environment Authors Siriwardena, ML, Rooke, JA, Koskela, LJ, Kagioglou, M, Mcdermott, P, Sexton, MG and Aouad, GF Type Conference or Workshop Item URL This version is available at: http://usir.salford.ac.uk/id/eprint/4878/ Published Date 2008 USIR is a digital collection of the research output of the University of Salford. Where copyright permits, full text material held in the repository is made freely available online and can be read, downloaded and copied for non-commercial private study or research purposes. Please check the manuscript for any further copyright restrictions. For more information, including our policy and submission procedure, please contact the Repository Team at: usir@salford.ac.uk .