“…Additionally, these existing factors are good references for studying the sustainable implementation of the PPP project. Among them, all of the CSFs mainly involved four types, i.e., the public sector-related factor [11,17,29], the private sector-related factor [12,13], the environment-related factor [26,29,30] and the factor of the process of services provision [11,16,45,47,49]; these findings are also good references for determining the CSFs and questionnaire design. However, all of the previous studies determined the critical success factor for the PPP project, but the interrelationships among CSFs were ignored; and the variable of the public in PPP is also not included in the CSF framework constructed in the previous research.…”