Application of Geographic Information System for Preparing the Bill of Quantities of Construction Projects
Main Article Content
Abstract
The information required for construction quantities surveying is not only generated by various participants in different construction phases but also stored in different forms including graphics, text, tables, or various combinations of the three. To report a bill of quantities (BOQ), the project manager has to continuously excerpt information from various resources and record it on papers. Without adequate staff and time, this repetitive and tedious process is difficult for the project manager to handle properly and thus reduces the effectiveness and the accuracy of the quantities surveying process which creates problems during the design, tender, and construction supervision of construction projects for designers and contractors practicing because receipts are based upon actual quantities, such variations have an obvious impact on the contractor’s cash flow, once the actual quantities frequently vary from the estimated quantities listed in the BOQ. Hence, automation quantity surveying system has been developed by using GIS to extract the
data required for the quantity of different components of any construction project from AutoCAD drawings (spatial data), to report a BOQ after querying, manipulation, and analyzing these data. The system has been implemented on the construction project of Al khawarizmy College at Baghdad University in Baghdad. The main results of using this system are automatic generation a bill of quantity (BOQ) directly from design drawing, with overcome to design changing, accurate, fast, and effective method for estimating the quantities, fewer errors in cost estimating, and better documentation for continuously reusing information in all construction phases. The accuracy of GIS quantities had been proved by comparing these quantities with the quantities of site surveying. Then determining the accuracy percentage (A%) of GIS quantities which equals (98.85%), and the regression line that equals 0.999. These values mean; there are big correlation between the estimated quantities by GIS and the quantities of site surveying.
Article Details
How to Cite
Publication Dates
References
Bansal, V. K., 2007, “Potential of GIS to Find Solutions to Space Related Problems in Construction Industry” World Academy of Science, Engineering and Technology, Vol. 32, pp. 307-310.
Bansal, V. K., and Pal, M., 2006, “GIS based projects information system for construction management.” Asian Journal of Civil Engineering, Vol. 7, No. 2, pp. 115-124.
Cheng, M.Y., and Yang, C.Y., 2001, “GISBased cost estimate integrated with material layout planning.” Journal Construction Engineering and Management, ASCE, Vol. 127, No. 4, pp. 291-299.
Cheng, M.Y., and Yang, C.Y., 2001, “GIS-Based cost estimate integrated with material layout planning.” Journal Construction Engineering and Management, ASCE, Vol. 127, No. 4, pp. 291-299.
Camp, C.V., and Brown, M.C., 1993, “GIS procedure for developing three dimensional subsurface profile.” Journal of Computing in Civil Engineering, ASCE, Vol. 7, No.3, pp. 296-309.
Joshphar Kunapo, Ganeswara Rao Dasari, Kok-Kwang Phoon, and Thiam-Soon Tan, 2005, “Development of a Web-GIS Based Geotechnical Information System” Journal of Computing in Civil Engineering, ASCE, Vol. 19, No. 3, pp.323-327
Mohamed N. Jeljeli, Jeffrey S. Russell, Guy Meyer, H. W., and Alan P. Vonderohe, 1993, “Potential Application of Geographic Information System to Construction Industry” Journal of Construction Engineering and Management, ASCE, Vol. 119, No. 1, pp. 72-86.
Oloufa , A.R., Eltahan , A.A., and Papacostas, C.S., 1994, “Integrated GIS for construction site investigation.” Journal Construction Engineering and Management, ASCE, Vol. 120, No.1, pp. 211-222.
Parsons, R. L., and Frost, J. D., 2000, “Intractive Analysis of Spatial Subsurface Data Using GIS-Based Tool” Journal of Computing in Civil Engineering, ASCE, Vol. 14, No. 4, pp.215-222.
Sebt, M. H., Parvaresh Karan, E., and, Delavar, M. R., 2008, “Potential Application of GIS to Layout of Construction Temporary Facilities” International Journal of Civil Engineering, Vol. 6, No. 4, pp. 235-245.
Stephen E. Poku and David Arditi, 2006, “Construction Scheduling and Progress Control Using Geographical Information Systems” Journal of Computing in Civil Engineering, ASCE, Vol. 20, No. 5, pp.351-36o .
Construction Management Committee of the ASCE Construction Division. 1991, "Constructability and constructability program" Journal Construction Engineering and Management, ASCE, Vol. 17, No.1 pp.67-89.
Varghese, K., and O’Connor, J.T., 1995, “Routing large vehicles on industrial construction site.” Journal Construction Engineering and Management, ASCE, Vol. 121, No.1, pp. 1-12.
Zhong, D., Zhu, J. Li, H., and Song, L., 2004, “Geographic information system based visual simulation methodology and its application in concrete dam construction processes.” Journal Construction Engineering and Management, ASCE, Vol. 130, No.5, pp. 742-750.