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- MakaleYalnız künye2015Scopus SJRQ1A novel approach based on DEMATEL method and patent citation analysis for prioritizing a portfolio of investment projects
Altuntas, Serkan; Dereli, Türkay
The aim of this article is to propose a novel approach based on a method called Decision-Making Trial and Evaluation Laboratory (DEMATEL) and patent citation analysis for prioritizing the portfolio of investment projects. The proposed approach reflects the government's perspective and takes into account two important prioritization criteria. They are: (i) the decreasing rate of foreign trade deficits in the country and (ii) the potential to attract new investments which are not considered in the literature before. A case study from Turkey is presented to demonstrate the benefits of the proposed approach. The findings show that the proposed approach can be used easily and efficiently to prioritize investment projects among available project proposals.
AtıfScopus118WoS92
İncele - BildiriYalnız künye2014A causal and effect model for knowledge flow analysis among firms
Dereli, Türkay; Altuntas, Serkan; Kubat, C.; Cagil, G.; Uygun, O.
Examination of the relations among firms with respect to knowledge flows is essential for sustainable development and creative economy in global competition as well as for governments, investors and decision makers. Knowing the causal relations among firms provides answers to questions such as: (1) which firms have strong associations? (2) which firms are in the cause group and (3) which firms are in the effect group? The knowledge flow among firms shows the relations among firms directly. Patent citation analysis is extensively conducted to measure the knowledge flow in the literature. The decision making trial and evaluation laboratory (DEMATEL) method is also extensively used to construct causal relations among variables. In this study, the DEMATEL method based patent citation analysis is utilized to construct causal relations among firms. An illustrative example is presented to find relations among firms which operate business method technologies. The results of the example show that the DEMATEL based patent citation analysis can be performed to construct causal relations among firms.
- MakaleYalnız künye2012Scopus SJRQ1Multi-criteria decision making methods based weighted SERVQUAL scales to measure perceived service quality in hospitals: A case study from Turkey
Altuntas, Serkan; Dereli, Türkay; Yilmaz, Mustafa Kemal
The main objectives of this study are to: (i) measure hospital service quality by using analytic hierarchy process (AHP) and analytic network process (ANP) as a multi-criteria decision making method to acquire the relationship and the level of the importance among service quality measurement (SERVQUAL) dimension; (ii) find perceived service quality with respect to different hospital classes (A, B and C) in Istanbul, Turkey; (iii) compare AHP- and ANP-based weighted SERVQUAL scales with the unweighted SERVQUAL scale for public hospital service quality in terms of different hospital classes (A-B and C). First, four hospitals are selected randomly for each class and then, a questionnaire based on the SERVQUAL model is conducted for each class to measure perceived service quality with respect to five major criteria, namely tangible, reliability, responsiveness, assurance and empathy, from patients' viewpoints at hospitals. Next, the second questionnaire based on ANP is developed to evaluate the importance of criteria and construct the relations among the criteria. The study sample contains 281 outpatients totally. Three important findings are obtained in this study. First, there is a significant difference among different hospital classes regarding the perceived service quality. Second, according to the patients, the most important service quality dimensions are empathy, the knowledge of employees, sympathetic and reassuring employees, services provided at the time promised to do so, and safe feeling of patients in interactions with hospital employees. Thirdly, the, perceived service quality through the AHP- and ANP-based SERVQUAL scale is higher than that with the unweighted SERVQUAL scale.
AtıfScopus93WoS74OpenAlex100İncele