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This study aims to investigate the influence of contractual flexibility on different types of conflict, determine if contractual flexibility is significantly correlated with project success between contracting parties, verify the mediating effect of project conflicts on the relationship between contractual flexibility and project success and examine the relationship between different types of conflicts and project success in megaprojects.

A theoretical model was developed and a structured questionnaire survey was conducted with 468 professionals. The structural equation modeling technique was used to analyze the data.

The results showed that both types of contractual flexibility – term and process flexibility – were correlated with and significantly positively affected project success, and term flexibility was found to have a greater influence. The introduction of project conflicts …