Abstract
This study explores sustainability and continuous improvement in infrastructure delivery within emerging economies. While sustainable construction is widely accepted, its practice is often hindered by unclear regulations, institutional challenges, and local barriers. A systematic literature review (SLR) of 51 peer-reviewed studies was conducted using the PRISMA 2020 protocol, applying Braun and Clarke's thematic analysis to identify key patterns. The findings highlight critical success factors such as leadership commitment, clear policy regulations, and stakeholder engagement, alongside constraints like weak regulatory systems and limited technical capacity. The study introduces a conceptual framework illustrating how these factors interact across different levels and introduces a stakeholder-action matrix linking actors to targeted strategies. These tools offer both theoretical insights and practical guidance for advancing sustainable infrastructure delivery.