The twin principles of phase development and fragmentation, as execution models, have made a significant impact on effective infrastructure delivery. However, recent experience seems to negate these assertions. Therefore, this research aims to evaluate how these two principles were used in the execution of two identical road projects, named Project A and Project B, and the impact of the following four factors on their execution, namely, the practice of phase development and fragmentation, contractor selection, project planning and management as well as the project funding system. The principles of ‘Content Analysis Study’, a qualitative research strategy, were adopted as the research method. The findings revealed that Project A was successful in the factors evaluated and the chosen phase was completed within schedule. In contrast, Project B failed. This project initiated in 2006 was still a work in progress in 2023. The conclusion is that the purposive use of the principles and practice of phase development and fragmentation can facilitate effective project delivery.

Keywords: Fragmentation, Infrastructure delivery, Phase development, Project planning and management