Moderating Effect of Project Type on the Relationship between Project Delivery Systems and Cost Performance
Publication: Journal of Management in Engineering
Volume 39, Issue 1
Abstract
This study examines the moderating role of project type between project delivery system (PDS) and cost performance to decide whether project types should be addressed prior to evaluating PDS performance. Previous studies evaluating PDSs performance using direct relationship analysis present controversial assessments in terms of cost-efficiency. They recognize that project type causes inconsistencies when comparing design–build (DB) and design–bid–build (DBB) systems. However, they have yet to determine the specific role of the project type, leading to ambiguity regarding how to control the project type (e.g., a dataset using unspecified or mixed project types). This study employed a moderation analysis to identify the role of project type and to compare the cost performance of DB and DBB systems associated with project types as a post hoc test, leveraging statistical methodology, based on 90 public building projects in Seoul, South Korea. The results show that the moderating effect of project type is statistically significant. The cost growth in DB for nonresidential building projects presents statistically lower than that in DBB, whereas the cost growth difference between DB and DBB for residential buildings is not statistically significant. Additional analysis of full life-cycle cost performance shows another dimension of comparison that indicates the cost performance comparison of DB and DBB projects is controversial and more likely to be influenced by other factors. This study contributes to the engineering in the management body of knowledge by distinguishing the effects of project type and PDS on cost performance using a causal relationship analysis. The findings provide objective criteria for public-sector practitioners in the Architecture, Engineering, and Construction industry on how to address project types when they evaluate and select PDS and enhance the consistency of PDS evaluation in terms of cost performance.
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Data Availability Statement
All data used during the study were provided by a third party. Direct requests for these materials may be made to the provider as indicated in the Acknowledgments.
Acknowledgments
This work is based on the first author’s Ph.D. dissertation. The research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2021R1I1A1A01049141 and NRF-2020R1I1A1A01067292). The authors are grateful to the Seoul Special City for sharing the data collected during the study.
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Published In
Journal of Management in Engineering
Volume 39 • Issue 1 • January 2023
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Nov 2, 2021
Accepted: Jun 28, 2022
Published online: Sep 23, 2022
Published in print: Jan 1, 2023
Discussion open until: Feb 23, 2023
ASCE Technical Topics:
- Buildings
- Comparative studies
- Construction costs
- Construction engineering
- Construction management
- Design-bid-build
- Engineering fundamentals
- Facilities (by type)
- Mathematics
- Methodology (by type)
- Project delivery
- Project management
- Public buildings
- Research methods (by type)
- Statistics
- Structural engineering
- Structures (by type)
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