This exercise was commissioned independently by the Office of Independent Evaluation several years after project initiation and was not originally envisaged in the WSIP design. Its primary purpose is to generate timely, credible, and actionable evidence to inform adaptive management, support mid-course corrections, and strengthen the likelihood that WSIP’s infrastructure investments translate into sustained behavioural and social outcomes. Beyond supporting WSIP implementation in Guyana, the evaluation seeks to generate transferable lessons on applying RTE in infrastructure and utility reform projects, strengthening the Caribbean Development Bank's (CDB's) capacity to integrate timely evidence into management and decision-making across its portfolio.

Rather than assessing final results or impacts, the evaluation focuses on how the project is unfolding in practice, whether its underlying assumptions, particularly those related to trust, service adoption, and behavioural change are holding, and what conditions are emerging to enable or constrain impact. In doing so, the RTE supports both project-level decision-making in Guyana and broader institutional learning for CDB on the use of RTE approaches in complex infrastructure operations.