Supply Chain Integration in Project-Based Organizations and its Effect on Performance Younis Jabarzadeh and Rahim Najafi Department of Management University of Tabriz Tabriz, Iran yjabarzade@tabrizu.ac.ir, rahimnajafi019@gmail.com Vikas Kumar Bristol Business School University of the West of England Bristol, UK Vikas.Kumar@uwe.ac.uk Ali Arjmand zavoshti Department of Management University of Tabriz Tabriz, Iran ali.arjmand1992@gmail.com Abstract Supply chain integration has been proven to have a significant effect on the performance of organizations. The previous studies have been about the supply chain integration in manufacturing or service organizations and project- based organizations were not taken into consideration. The increasing importance of the project-based organization and their supply chains in delivering high-profile results highlights the need for studying different aspects of them regarding supply chain variables. Since it is a new area of investigation with very few related studies, the main question is "what effect does the supply chain integration have on the performance of the project-based organizations?" For evaluating the mentioned question, a questionnaire was used to gather data from 211 project-based organizations. Using structural equations modeling with a variance-based approach, the hypothesized relationships were tested. The results show that supply chain integration (the supplier integration and the internal integration of the organization) has a significant effect on the performance of the project-based organizations and the supply chain integration toward the customers does not have any effect on the performance of the project-based organizations. It is suggested that in project-based organizations, supplier and internal integration should be promoted using proper mechanisms. Keywords Supplier integration, Customer integration, Internal integration, Project-based organization, organization performance Proceedings of the 11th Annual International Conference on Industrial Engineering and Operations Management Singapore, March 7-11, 2021 © IEOM Society International 5860