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supported by the sibling associations ACADIA, CAADRIA, eCAADe, SIGraDi, ASCAAD and CAAD futures

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id ascaad2007_049
authors Mokbel, H.; G. Salazar, M. Aboulezz and J. Tocci
year 2007
title Choosing Levels of Granularity in Building Information Modeling: Contractor’s Perspective
source Em‘body’ing Virtual Architecture: The Third International Conference of the Arab Society for Computer Aided Architectural Design (ASCAAD 2007), 28-30 November 2007, Alexandria, Egypt, pp. 623-634
summary Over the last two years, there has been an increased interest across the Architectural /Engineering/ Construction (A/E/C) professionals in the potential adoption of the Building Information Modeling. Professional Associations such as the American Institute of Architects (AIA), the Associated General Contractors (AGC) and the Design-Build Institute of America (DBIA) are dedicating specific resources to better understand the implications of the use of this concept in their professional activities. However, not much ground has been gained yet in finding practical ways to choose the level of granularity (LOG) or detail that is needed to develop the digital model in a cost effective fashion. Choosing the Level of Granularity (LOG) of the digital model or level of detail development that goes into the model is a key decision that results from careful consideration of many factors. It is a very complex and iterative process that requires a critical assessment of the cost of adding details to the digital model versus the benefits derived from its intended purpose whether the model will be used to enhance the communication process or to support the construction management functions performed by the firm. This paper presents two case studies in which the authors have been directly involved in making the decision on the LOG of the digital model. The first case involves the Togar Suites, Union Station project in New Jersey while the second case refers to the Worcester Trail Courthouse in Worcester Massachusetts. In both cases, the 3D models were developed primarily for visualization of the construction sequence. However, in the case of the Togar Suites the contractor also needed the model for trade coordination and clash detection purposes.
series ASCAAD
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100%; open Mokbel, H., Salazar G., (2004) Find in CUMINCAD Assessing the Parametric Building Model Capabilities in Minimizing Change Orders , Proceedings of the 2nd. International Conference: Comparing Design in Nature with Science and Engineering sponsored by the Office of Naval Research, Rhodes, Greece, June.

100%; open Rundell, R. and Stowe, K. (2005) Find in CUMINCAD Building Information Modeling and Integrated Project Delivery- Design-Build Synergy in Action , Design—Build Dateline, June..

100%; open Salazar, G., Polat, I., and Almeida, J., (2003) Find in CUMINCAD The Role of the 3D Parametric Building Model in the Future Education and Practice of Civil Engineering and Construction , Proceedings of the ASCE IV Joint International Symposium on Information Technology in Civil Engineering, Nashville, TN, November

100%; open Samdadia, V., (2004) Find in CUMINCAD Correlation between 3D Parametric Building Model and Geographic Information Systems in Facility Management , M.S. Thesis, WPI, Worcester, MA.

100%; open Swayer, T., (2005) Find in CUMINCAD Ideas Look Real , Engineering-News Record, Magazine, McGraw Hill Companies, July 11, pp. 28 -33. 3rd Int’l ASCAAD Conference on Em‘body’ing Virtual Architecture [ASCAAD-07, Alexandria, Egypt]

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