This study examined the factors that affect the private sectors\' willingness to invest in rural water supply. The study applied a mixed methods approach, including an overview of relevant studies, expert consultation, exploratory factor analysis using SPSS software, and a fuzzy-analytic hierarchy process to identify and evaluate the factors applicable to Ha Nam province in Vietnam. Some factors were distinguished that are significant to private investors\' rural water supply investment decisions, including tax incentive policy, policies to support preferred access to loans and credit, a state risk-sharing mechanism, a mechanism to adjust water price, community support, high community demand for clean water, and input water quality. In addition, the study constructed an investment attractiveness index to evaluate the attractiveness of private sector investment for two typical rural water supply projects in Ha Nam province. This index can be used as a basis for the government to design appropriate incentives to attract investment from private investors and construct an investment attractiveness map.

Evaluating the quality of occupational safety and health (OSH) services by experts is essential for both employee health and workplace productivity. In this study, first, the quality of OSH services is evaluated with a questionnaire using the SERVPERF method. Then, a questionnaire prepared according to the analytic hierarchy process (AHP) method is applied to OSH experts and the relative importance of the main dimensions and items in the SERVPERF method are determined. The weights of the items in the SERVPERF method are calculated with the AHP and fuzzy-analytic hierarchy process (FAHP). The quality scores obtained by the SERVPERF, AHP and FAHP methods are analyzed comparatively. The results show that the work environment-related measures and physical facilities in the workplaces are more inadequate, whereas assurance and empathy are better. Moreover, the items with the lowest value in the SERVPERF method get the highest score in the AHP and FAHP.