Abstract
Lee, B.N., Jung, Y., Lee, Y.H., Kwon, J.Y., Park, H., Je, T.K., and Moon, J.Y. (1999).
Order of Magnitude Estimate Using Historical Labor Productivity.
Research Report, POSCO Engineering & Construction Co., Ltd. (POSEC),
Seoul, Korea, 270 pages, (Korean).
Preliminary estimating, especially for the design-build contracts, is a critical process to predict the total cost of a project with incomplete information under uncertain conditions.
Several different methodologies have been utilized to enhance the accuracy of the estimate. However, integrating estimating systems with on-site project control data has not been properly addressed in previous research,
while this integration can continuously provide with real-time and vital information.
In this context, the purpose of this paper is to develop a prototype system for the order of magnitude estimates by means of a shared code of account (COA) and shared construction performance databases focused on actual labor productivity.
The proposed system also enables the effective use of historical database, adaption of earned value management systems (EVMS), and evaluation of craft performance. The concept, methods, and brief discussion of an on-going research for real-world implementation are introduced.
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