Abstract
Despite the presence of various construction project cost estimate softwares, human experience and knowledge cannot be disregarded. This fact has been proven in practice, where the success of construction cost estimate process is mainly based on knowledge of human estimator. The main question concerns what human knowledge determines the success of the construction cost estimation process. To address this question we have applied Delphi technique and the output is eleven factors that are enough to precisely represent construction cost estimator knowledge. Then we have used First Order Logic (FOL) to represent these factors in terms of predicates and rules. These FOL rules could be used for evaluating construction cost estimator knowledge in five classes: fail, pass, acceptable, good, and very good. As a validation process we have done experiments using history data and the results have proved the accuracy of our proposed method.
Highlights
Cost estimation is the most important preliminary process in any construction project
There are significant numbers of research papers that have discussed usage of the expert system in construction cost estimation process, there is no work that defined what these human factors are, which make a person be an expert in construction cost estimation, i.e., construction cost estimator
The accuracy of the construction cost estimation of the human expert is dependent on his knowledge with respect to these points
Summary
Cost estimation is the most important preliminary process in any construction project. It is challenging to define precisely the estimator specific factors but it is crucial to understand how human-expert can deal with the process of estimating the cost of construction projects. There are significant numbers of research papers that have discussed usage of the expert system in construction cost estimation process, there is no work that defined what these human factors are, which make a person be an expert in construction cost estimation, i.e., construction cost estimator. The aim of this research is to determine, and verify the human factors that affect estimation of the cost of a construction project as undoubtedly human expertise plays a key role in the success of this process. To the best of our knowledge, this is the first work that deals with the knowledge of construction project cost estimator
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