Impact of Correlation on Cost-Risk Analysis for Construction Highway Projects

Major construction projects are often constructed by dividing the project into smaller, more manageable segments. Managing these projects is a complex task due to risk and uncertainty. Many studies have proposed risk analysis frameworks to analyze the impact of risk on project outcomes. However, a limited study has addressed the effect of considering correlations on the cost-risk analysis frameworks. Capturing correlation between variables during the risk analysis process is an important, but a challenging task. This paper examines the impact of correlation between project phases/segments on total project cost. The Federal Highway Administrative cost-risk analysis framework was investigated. The correlation coefficient assessment was determined based on a comprehensive review of literature and several risk management frameworks used in transportation and transit sectors. The paper includes a case example that discusses the impact of correlation on the total project cost uncertainty in detail. The findings from this paper contribute to a construction risk analysis and management domain by showing the effect of considering correlation on the cost-risk analysis process. The results from this paper also help the highway industry to better manage their projects by performing a more accurate risk cost estimate.

[1]  Roger M. Cooke,et al.  Uncertainty Analysis with High Dimensional Dependence Modelling: Kurowicka/Uncertainty Analysis with High Dimensional Dependence Modelling , 2006 .

[2]  Sungbin Cho,et al.  An exploratory project expert system for eliciting correlation coefficient and sequential updating of duration estimation , 2006, Expert Syst. Appl..

[3]  A. Touran,et al.  RANK CORRELATIONS IN SIMULATING CONSTRUCTION COSTS , 1997 .

[4]  Kwong Wing Chau,et al.  Monte Carlo simulation of construction costs using subjective data , 1995 .

[5]  Ali Touran,et al.  Monte Carlo Technique with Correlated Random Variables , 1992 .

[6]  David M. Wall,et al.  Distributions and correlations in Monte Carlo simulation , 1997 .

[7]  Ahmet Öztaş,et al.  Scenario based evaluation of a cost risk model through sensitivity analysis , 2015 .

[8]  Keith R. Molenaar,et al.  Guidebook on Risk Analysis Tools and Management Practices to Control Transportation Project Costs , 2010 .

[9]  Ali Touran,et al.  A Method for Calculating Cost Correlation among Construction Projects in a Portfolio , 2012 .

[10]  I-Tung Yang,et al.  Using Gaussian copula to simulate repetitive projects , 2006 .

[11]  R. Iman,et al.  Rank correlation plots for use with correlated input variables , 1982 .

[12]  Wei-Chih Wang,et al.  MODEL FOR EVALUATING NETWORKS UNDER CORRELATED UNCERTAINTY--NETCOR , 2000 .

[13]  M. Ranasinghe.  Impact of correlation and induced correlation on the estimation of project cost of buildings , 2000 .

[14]  A. Touran.  Probabilistic Cost Estimating with Subjective Correlations , 1993 .