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Different researchers have tried to determine the factors for a successful project for a long time. Lists of variables have been abounded in the literature, however, no general agreement can be made. The aim of this paper is to develop a conceptual framework on critical success factors ͑CSFs͒. Seven major journals in the construction field are chosen to review the previous works on project success. Five major groups of independent variables, namely project-related factors, project procedures, project management actions, humanrelated factors, and external environment are identified as crucial to project success. Further study on the key performance indicators ͑KPIs͒ is needed to identify the causal relationships between CSFs and KPIs. The causal relationships, once identified, will be a useful piece of information to implement a project successfully.

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Although green building technologies (GBTs) have been advocated in the construction 12 industry to address sustainability issues, their adoption is still plagued with barriers. The 13 barriers that hinder GBTs adoption need detailed investigation. However, few studies have 14 been conducted on the barriers to GBTs adoption in developing countries such as Ghana. 15 This study aims to investigate the critical barriers to GBTs adoption with reference to the 16 Ghanaian construction market. To achieve the objective, 26 barriers were identified from a 17 comprehensive literature review, and a questionnaire survey was performed with 43 18 professionals with green building experience. The ranking analysis results indicated that 20 19 barriers were critical. The top three most critical barriers were higher costs of GBTs, lack of 20 government incentives, and lack of financing schemes (e.g., bank loans). A comparative

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