Measuring sensitivity to change orders in construction projects using eigenvector centrality and radius of gyration

Zarghami, Seyed Ashkan

doi:10.1108/ecam-09-2022-0870

Cited by 4 publications

(2 citation statements)

References 48 publications

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“…Sensitivity model for construction projects to consider future modifications in the final phases of the project (which are usually more important than the modifications affecting earlier phases). [38] The other research line has shown that 65% of 98 projects experienced cost overruns due to modifications, averaging 8% [39]. This is primarily due to repeated work requests, with only 0.39% attributed to these changes.…”

Section: Description Observations Referencementioning

confidence: 98%

The Relationship between Cost Overruns and Modifications for Construction Projects: Spanish Public Works and Their Legal Framework

Alonso-Iglesias,

Ortega-Fernández,

Rodríguez-Montequín

et al. 2023

Buildings

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Cost overruns are a common problem for public works projects, often due to modifications to the original design. While the causes of these modifications have been studied, the legal framework’s impact and limitations on these modifications have received extensive treatment, with no specific case studies from different countries. This paper explores the relationship between modifications in Spanish public works projects and their compliance with legal limits, investigating the alignment between base bidding prices and eventual costs after adjustments. The study also delves into the strategic behaviour of construction companies in Spain, which frequently involves manipulating project costs to match the initially proposed bidding price. Statistical methods, such as the Spearman correlation test and graphical analysis, confirm a nearly exact relationship between base bid price and final price. Also, a modification costs comparison for two different legal periods highlights the legal framework’s influence, as a less restrictive framework leads into higher average cost overruns. It provides valuable information to avoid malpractice for tendering institutions, practitioners, and legal developers, as well as those interested in the Spanish public works sector, and opens the door for future research on solving this problem.

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Section: Description Observations Referencementioning

confidence: 98%

The Relationship between Cost Overruns and Modifications for Construction Projects: Spanish Public Works and Their Legal Framework

Alonso-Iglesias,

Ortega-Fernández,

Rodríguez-Montequín

et al. 2023

Buildings

View full text Add to dashboard Cite

show abstract

“…En el trabajo de Zarghami (2023) se realiza una investigación con la que se propone un modelo de sensibilidad de los proyectos de construcción a contemplar modificaciones futuras en las fases finales del proyecto, dando lugar a mayores problemas que en fases anteriores.…”

Section: Los Modificados De Proyectos En Ingeniería Civilunclassified

Los modificados de proyectos públicos y sus sobrecostes: caso de la ingeniería civil en España

2023

Proceedings From the International Congress on Project Management and Engineering

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The construction sector has historically been linked to public projects. One of the most common problems that concerns society in this type of projects are the cost overruns, usually linked to change-orders of the original projects. The cost that these change-orders have an impact on the public treasury is unacceptable for a society that seeks efficient and sustainable development. Therefore, it is necessary to examine in depth the circumstances and nature of the causes of these change-orders. This paper focuses on the specific case of public civil engineering projects in Spain. By generating a database of projects that have been subject to modifications, their relationship with the Spanish legislative change in 2018 is analysed, to observe the possible performances of the projects according to the legally stipulated limits.

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Anatomy of interactions among risk factors influencing implementation of building information modeling (BIM): a system dynamics approach

Zarghami

2023

ECAM

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PurposeThe overarching objective of this paper is to examine the cause–effect relationships among building and information modeling (BIM)-related risk factors and their impact on the implementation of BIM in construction projects.Design/methodology/approachThis paper draws on previous research to identify and categorize BIM-related risk factors. It then develops a system dynamics (SD) model to examine the cause–effect relationships among these factors leading to issues in BIM implementation.FindingsThe proposed SD model illustrates how nine reinforcing feedback loops provide connections between four categories of risks, namely, technical, information, legal and organizational risks and, consequently, create vicious cycles that threaten the successful implementation of BIM.Originality/valueThis paper is among a few studies that depart from reductionism by taking a holistic approach and demonstrating how the interactions between BIM-related risk factors lead to vicious cycles that threaten the successful implementation of BIM.

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Measuring sensitivity to change orders in construction projects using eigenvector centrality and radius of gyration

Cited by 4 publications

References 48 publications

The Relationship between Cost Overruns and Modifications for Construction Projects: Spanish Public Works and Their Legal Framework

The Relationship between Cost Overruns and Modifications for Construction Projects: Spanish Public Works and Their Legal Framework

Los modificados de proyectos públicos y sus sobrecostes: caso de la ingeniería civil en España

Anatomy of interactions among risk factors influencing implementation of building information modeling (BIM): a system dynamics approach

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