Belay, A M and Torp, O (2023) Construction cost performance under quality-gated framework: The cases of Norwegian road constructions. International Journal of Construction Management, 23(6), pp. 1030-1043. ISSN 1562-3599
Abstract
Cost increase during the planning phase of major infrastructure projects is a crucial challenge which is typical in construction management. This research aims to provide a better understanding of the cost development of road-construction projects and enhance the knowledge on various project attributes that affect cost development. A detailed cost development study (quantitatively chart the cost- trends) and analysis on cost departures at each key-milestone starting from the initial to the final cost is conducted. The impact of different project attributes/settings (size, location, and quality assurance) on cost development are investigated. The research used a dataset of 110 projects from the last two-decades and analyzed using various statistical tests such as trend-analysis, probability-plots, and cost development over-time at the different project milestones. The results showed a decrease in cost-deviation after quality assurance scheme implemented (except few projects). The overall cost development showed an average increase of 5%. The research found different project-setting affect cost development at different magnitude. It provides new insight for construction managers, quality assurers, and cost-estimators to consider different project settings at the early-phases of the project. It helps to understand the individual and combined effects of project-settings and enable decision-makers to act proactively in cost decisions.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | cost development; infrastructure; project setting; quality assurance; trend analysis |
| Index terms: | statistical test, dataset, construction manager, estimator, cost increase, construction project, quality assurance, infrastructure project, road construction, deviation, construction cost |
| Subjects: | civil engineering, economics, production management, data management, statistical analysis, quality assurance, infrastructure and transport systems, profession, financial and cost management |
| Topics: | Quality Management, Digital Applications, Engineering Principles, Research Practice, Project Management, Cost Management, Roles and Professions |
| Descriptive scope: | 3 PCA |
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