With the current urgency to become more circular, procurement presents the primary method to deliver the circular policy ambition by purchasing circular products and stimulating circularity in the market. In the building and infrastructure sector, civil engineering projects offer unique opportunities for circularity. This research presents an assessment of the implementation fidelity of the circular ambition within the tendering process. It examines for each of the methods that define the tendering process, the tendered project, and the awarding framework whether the way circularity is being implemented delivers the ambition as expected.
Along with the four research phases, the research devises and uses a framework to assess the fidelity of circularity implementation through the methods to include it in the tendering of civil engineering works. The implementation fidelity framework is used to; create a holistic analysis that captures the many facets impacting the tendering process; determine areas of issues and, consequently, room for improvements; and differentiate between the methods to include the circular ambition in the process. Through three study cases, the construct of the analysis managed to capture the data between quantitative and qualitative in a consistent and interpretable manner. It creates a consistent link between the fidelity dimensions, the corresponding issue areas, and the methods to include circularity in the tendering process.
The room for improvement follows the three moderating dimensions, exposure, quality of delivery, and participation. The research links the issues impacting the fidelity of circular ambition implementation in three categories: structural issues, implementation traps, and policy-related, to the three moderating dimensions. The research acknowledges that policy-related issues impact at a sector level as issues inherent to the policy itself. Nonetheless, the research finds that, on an organizational level, removing structural issues and implementation traps raises overall fidelity and reduces the effect of policy-related issues. Increasing this fidelity reflects on the efficacy of the methods to include circularity in tendering, individually and as a group of instruments intended to complement each other.
In conclusion, the research recommends practical use of the implementation fidelity framework, which would feed into the body of expertise within an organization to improve future tendering processes to include, enable, and produce more circular solutions with more efficacy in the use of the methods. It will also allow aligning perceptions of the contractors and the contracting authority on one hand and the policymakers and policy implementers on the other hand. For future research, examining all five implementation fidelity dimensions for the instruments and processes at the different levels throughout the procurement cycle is most compatible with the circular ambition in the building and infrastructure sector. This could be most beneficial to establish a more vital link between policymakers and policy implementers. Moreover, it would support future efforts to update the circular ambition goals and milestones by presenting a more encompassing image of the policy implementation fidelity in real-world settings.