icccbe 2010 © Nottingham University Press Proceedings of the International Conference on Computing in Civil and Building Engineering W Tizani (Editor) Abstract Conflict of temporary facilities, which is arranged in construction site, occurs frequently between their workspaces, due to unanticipated space requirements. And workspaces of temporary facilities that are executed within a limited area are not providing the experiential and the objective resolution strategies for physical collisions to manage conflicts among workspaces. To resolve these problems, this research develops a methodology and set of tools that capable of generating and defining 3D objects of temporary facilities workspace, and develops the heuristic model of rule-base inference to suggest conflict resolution strategies by each conflict type, integrated visualisation and interaction technologies Keywords: temporary facility, workspace, logical conflict, physical conflict, virtual reality 1 Introduction Workspace conflict in any construction site is related to a number of causes such as schedule conflicts, poor resource planning, and design errors. Due to such causes, conflicts of members, equipment’s and workers’ activity space, and placement of temporary facilities and storage yards take place. To address this issue, it is necessary to utilise various onsite empirical strategies and to introduce a methodology that can resolve physical conflicts in an objective manner through VR (Virtual Reality)- based systems (Moon 2009a). Existing researches include studies to confirm object collisions between materials and equipment (Kevin et al. 2008, R. Kamat et al. 2005, S.Nigidkar 2005), studies on visualising workspace congestion (Guo 2002, Mallasi 2006), studies on verifying time-space based congestion of structures centering on vertical, repetitive work (R. Riley et al. 1997, Akinci et al. 2002, Dawood 2006), and studies on calculating level of conflicts of workspace considering safety hazard areas of work (R. Sacks et al. 2009). However, these studies have not been successful in presenting a conflict verification model nor sufficient cases of system establishment. The proposed model can effectively resolve workspace conflicts in a reasonable and objective way depending on the nature of a given workspace conflict. To address workspace conflict verification, the workspace type is defined and a 3D shape model is established in this study. Next, workspace constraints based on how a workspace is created and conflict types are identified. In addition, a heuristic rule-based inference model is developed to address logical conflicts and a methodology to build a system to optimise physical conflicts is suggested. Furthermore, an integrated model is configured to allow interactions and visualisations to verify conflicts. The study aims to establish an integrated methodology that encompasses the architecture and a functional module for a VR-based integrated system to be used to verify workspace conflicts of temporary facilities. Development of a workspace conflict verification model for temporary facilities based on a VR simulation Hyoun-Seok Moon & Leen-Seok Kang CM&IT Lab, Dept. of Civil Engineering, Gyeongsang National University, Jinju, South Korea Nashwan Dawood Centre for Construction Innovation and Research, Teesside University, Middlesbrough, UK