Comparing Between Traditional and Integrated Project Delivery Systems Attributes for Optimizing Project Performance

Abstract

Abstract Integrated Project Delivery (IPD) is an approach to project delivery that aims to form a collaborative effort between project parties so that optimal construction is achieved by reducing costs and positively improving production. It is distinguished by a multilateral contractual agreement that typically allows risks and rewards to be shared among project stakeholders. This paper aims to explore the distinctive features of the IPD through statistically significant performance differences between IPD and traditional project delivery systems TPD. Data were collected to measure the quantitative performance of 20 projects for the period between (2010–2022) with detailed interviews of experts and the parties to those projects. Univariate data analyzes, such as T-test and one-way ANOVA, were performed to assess IPD performance. According to the statistical significance of 15 performance standards, improvements in project performance have been achieved through the application of IPD. This study showed acceptance of the assumption of homogeneity of variance and normal distribution since the value of the mean square error test is 0.306 and the level of significance is 0.051, which is greater than 0.05. The study also showed that the best alternative to analysis of variance if has a difference in the means is the use of non-parametric statistics. This study presents a significant contribution to improving the quality of project work and controlling cost and time by following IPD compared to other traditional project delivery systems. These results will provide evidence for project decision makers to follow the appropriate delivery method for Iraqi construction projects.