In this study, a new fuzzy decision-making model is created to evaluate whether the solar panels are efficient to minimize energy costs of the hospitals. The weights of the criteria are calculated by considering T-Spherical fuzzy decision-making trial and evaluation laboratory (DEMATEL) method. Moreover, for the purpose of measuring the coherency of the findings, analysis results are also calculated for different t values. Additionally, by making improvements to some criticisms to the classical DEMATEL method, a new technique is created by the name of TOP-DEMATEL while integrating some steps of technique for order preference by similarity to ideal solution (TOPSIS) to the DEMATEL technique. The main novelty of this study is that it is analyzed whether the solar panels are effective in reducing the costs of hospitals with an original decision-making model. It is concluded that generating own energy in the long run is the most crucial item according to both T-Spherical fuzzy DEMATEL and TOP-DEMATEL methods. The analysis results are quite similar for different t values. This situation gives information about the coherency and reliability of the findings. This situation gives information that the solar panels should be taken into consideration for the hospitals because they will minimize energy dependency of the hospitals. On the other side, the results of T-Spherical fuzzy TOP-DEMATEL indicate that the high initial investment cost is the second most critical factor in this respect. This finding is quite different by comparing with the results of T-Spherical fuzzy TOP-DEMATEL. Hence, it is seen that cost effectiveness should also be taken into consideration for the decision of generating the solar panels in the hospitals.

The aim of this study is to analyze the service quality in the Turkish health sector. In this context, a literature review is conducted, and 16 different criteria based on SERVQUAL are determined. Fuzzy DEMATEL method is used to determine which of these criteria are more important. The findings indicate that operating hours and quality of equipment have the highest weights. In addition to these items, experience of personnel and individual attention to patient are other important factors with respect to the service quality in Turkish health industry. Hence, it is strongly recommended that hospitals in Turkey should operate in an extended time because Turkish people prefer to go to the hospitals after working hours. It is also obvious that Turkish hospitals should make investment to quality equipment. Finally, it is a good idea for new hospitals to have qualified employee. This situation has a positive contribution to the service quality of these hospitals.

Energy costs have become a very important problem for businesses, especially in recent years. As a result of these high costs, businesses may experience financial problems. If this situation cannot be managed effectively, the profitability of the enterprises will decrease. This will put the long-term sustainability of businesses at risk. This problem is also very important for hospitals. Recently, the energy costs of hospitals have started to become very serious among the total costs. As a result, the need for hospitals to produce their own energy arose. This will help hospitals achieve energy independence. As a result, it will be possible for energy costs to be more manageable in the long run. In this study, the effect of small-scale wind turbines on the competitiveness of hospitals was analyzed. In this context, four different criteria based on balanced scorecard have been determined. The importance of these criteria was tested with the fuzzy DEMATEL method.

The purpose of this study is to reveal the relationship between the economic development of countries and the importance they attach to health. In this context, macroeconomic data on the economic development levels and health of 127 countries were included in the study. In the application part of the study, clustering and cross-table analysis were used. As a result of the k-means clustering analysis, a 76.4% similarity was found between the three countries groups and the economic development levels. Therefore, it is possible to talk about significant relationships between health expenditures/investments and economic development. In addition, it is seen that 90% of the country group that attaches importance to health expenditures consists of developed countries.

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