Sensitivity Analysis of Workspace Conflicts According to Changing Geometric Conditions


  • M. Rohani Faculty of Civil Engineering, Semnan University, Iran
  • G. Shafabakhsh Faculty of Civil Engineering, Semnan University, Iran
  • A. Haddad Faculty of Civil Engineering, Semnan University, Iran
  • E. Asnaashari Faculty of Civil Engineering, Semnan University, Iran
Volume: 7 | Issue: 1 | Pages: 1429-1435 | February 2017 |


Workspace conflicts and building components can happen in different forms and both permanently and temporarily. These spatial clashes affect the work process and deplete the project process. Geometric clash detection system of 4D simulation tools can identify the number of clashes for construction resources in the worksite to improve workflow planning. In the present research, building components and their corresponding workspaces were simulated, based on the schedule and activities, using a visual simulation tool. First, the total daily volumes of workspace were calculated according to the activities' schedule and compared by the available space in order to determine the critical days for the project. Then, the number of time-based conflicts were examined and analyzed for building components and resources among activities and by different tolerance distances. The main objective of this study was to evaluate the sensitivity analysis of clash numbers based on the geometrical conditions in different statuses (Inflexible, Semi-flexible and flexible) to assist the planner for detecting real conflicts. The results show that the tolerance distance of 0.2 to 1 meter for the clashes of workspace and the building components and 0.2 to 2 meters for the clashes of workspaces with each other to provide realistic results of actual construction operation conflicts. By the help of this methodology, the project planners are able to identify and prioritize the effective conflicts on the work process in comparison to the clashes resulted from iteration or minor design inaccuracy.


building components, construction workspace, geometrical clashes, tolerance distance


Download data is not yet available.


A. Mahalingam, R. Kashyap, C. Mahajan, “An evaluation of the applicability of 4D CAD on construction projects”. Automation in Construction. Vol. 19, No. 2, pp. 148-159, 2010 DOI:

H. Moon, N. Dawood, L. Kang, “Development of workspace conflict visualization system using 4D object of work schedule”. Advanced Engineering Informatics. Vol. 28, No. 1, pp. 50-65, 2014 DOI:

B. Koo, M. Fischer, “Feasibility Study of 4D CAD in Commercial Construction”. Journal of Construction Engineering and Management. Vol. 126, No. 4, pp. 251-260, 2000 DOI:

B. Akinci, K. Tantisevi, E. Ergen, “Assessment of the Capabilities of a Commercial 4D CAD System to Visualize Equipment Space Requirements on Construction Sites”, Construction Research Congress. p. 1-7, 2003 DOI:

K. Tantisevi, B. Akinci, “Automated generation of workspace requirements of mobile crane operations to support conflict detection”, Automation in Construction, Vol. 16, No. 3, pp. 262-276, 2007 DOI:

X. Su, A spatial temporal information model for construction planning, Purdue University, 2013

H. J. Wang, J. P. Zhang, K. W. A. Chau, “4D dynamic management for construction planning and resource utilization”, Automation in Construction, Vol. 13, No. 5, pp. 575-589, 2004 DOI:

G. Winch, S. North, “Critical Space Analysis”, Journal of Construction Engineering and Management, Vol. 132, No. 5, pp. 473-481, 2006 DOI:

T. Hartmann, J. Gao, M. Fischer, “Areas of Application for 3D and 4D Models on Construction Projects”. Journal of Construction Engineering and Management, Vol. 134, No. 10, pp. 776-785, 2008 DOI:

M. Rohani, G. Shafabakhsh, A. Haddad, E. Asnaashari, “Operation Planning of Concrete Box Girder Bridge by 4D CAD Visualization Techniques”, International Journal of Civil, Environmental, Structural, Construction and Architectural Engineering. Vol. 10, No. 6, pp. 790-796, 2016

V. C. Dixit. “4D Modeling: Adding a New Dimension to CPM Scheduling”, AACE International Transactions, 2007

D. Heesom, An Analytical System for Space Planning on Construction Sites, University of Wolverhampton, 2004

B. Akinci, M. Fischen, R. Levitt, R. Carlson, “Formalization and Automation of Time-Space Conflict Analysis”, Journal of Computing in Civil Engineering, Vol. 16, No. 2, pp. 124-134, 2002 DOI:

R. Morkos, J. Macedo, M. Fischer, C. Somu, “Quantifying Effects of Specific 4D Tool Functionalities on 4D Modeling Productivity”, Proceedings of the CIB W78, Beirut, Lebanon, 2012

W. Thabet, Y. Beliveau, “Modeling Work Space to Schedule Repetitive Floors in Multistory Buildings”, Journal of Construction Engineering and Management, Vol. 120, No. 1, pp. 96-116, 1994 DOI:

I. Chen Wu, Y. Chang Chiu, “4D Workspace Conflict Detection and Analysis System”, Conference on Construction Applications of Virtual Reality, 2010

M. Rohani, M. Fan, C. Yu, “Advanced visualization and simulation techniques for modern construction management”, Indoor and Built Environment, Vol. 23, No. 5, pp. 665-674, 2014 DOI:

M. Kassem, N. Dawood, R. Chavada, “Construction workspace management within an Industry Foundation Class-Compliant 4D tool”. Automation in Construction. Vol. 5, No. 2, pp. 42-58, 2015 DOI:

D. Riley, “The Role of 4D Modeling in Trade Sequencing and Production Planning”, Construction Congress VI, pp. 1029-1034, 2000 DOI:


How to Cite

M. Rohani, G. Shafabakhsh, A. Haddad, and E. Asnaashari, “Sensitivity Analysis of Workspace Conflicts According to Changing Geometric Conditions”, Eng. Technol. Appl. Sci. Res., vol. 7, no. 1, pp. 1429–1435, Feb. 2017.


Abstract Views: 513
PDF Downloads: 387 Untitled Downloads: 0 Untitled Downloads: 0 Untitled Downloads: 0 Untitled Downloads: 0 Untitled Downloads: 0 Untitled Downloads: 0

Metrics Information
Bookmark and Share