Multi-Attribute Decision Making
Abbas Jahangiri
Abstract
Purpose: Selection of the appropriate process is one of the most important issues prior to design and construct any wastewater treatment plant. Considering the importance of this issue, current study was carried out to selecting the best wastewater treatment process in city of Farmahin.Methodology: In ...
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Purpose: Selection of the appropriate process is one of the most important issues prior to design and construct any wastewater treatment plant. Considering the importance of this issue, current study was carried out to selecting the best wastewater treatment process in city of Farmahin.Methodology: In this descriptive study that conducted in 2021, three wastewater treatment processes named: Activated Sludge with nitrogen and phosphorus removal, Extended Aeration with nitrogen and phosphorus removal and Membrane Bioreactor were considered as problem alternatives. The required data was obtained by distributing a researcher-made questionnaire consisting of cost, technical, environmental and managerial criteria among 21 experts. The weight of each attribute was determined using the Entropy method and finally, decision matrix was processed by using one of the newest multiple attribute decision making methods called “Measurement Alternatives and Ranking according to COmpromise Solution (MARCOS)”. It should be noted that all calculations were performed using Excel 2016 software.Findings: The results showed extended aeration with nitrogen and phosphorus removal with 0.758 utility function has taken first priority, activated sludge with removal of nitrogen and phosphorus with a 0.723 utility function has taken second priority and finally membrane bioreactor with 0.576 utility function has taken last priority. Therefore, the best wastewater treatment process in the city of Farmahin is extended aeration with nitrogen and phosphorus removal.Originality/Value: In this paper, by using one of the newest multiple Attribute decision making methods called "MARCOS", the best wastewater treatment process for the city of Farmahin was selected. The results of this research are very useful for the Markazi Province Water and Wastewater Company.
Multi-Attribute Decision Making
Abbas Jahangiri
Abstract
Service organizations such as water and wastewater companies need feedback and performance evaluation to deliver better services. The purpose of this study was to analyze trend of water supply to Iranian cities and villages and wastewater disposal from them during the years 2012 to 2018. For this purpose, ...
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Service organizations such as water and wastewater companies need feedback and performance evaluation to deliver better services. The purpose of this study was to analyze trend of water supply to Iranian cities and villages and wastewater disposal from them during the years 2012 to 2018. For this purpose, in this descriptive-cross-sectional study that required data were adapted from the statistical yearbook of the national water and wastewater company, performance of four areas include urban water supply, rural water supply, urban wastewater disposal and rural wastewater disposal over 7 consecutive years were evaluated by using one of the newest multiple attribute decision making methods called Measurement Alternatives and Ranking according to COmpromise Solution (MARCOS) with considering each year as an alternative and using time series analysis and linear fitting with the help of Excel and SPSS software. The results, with a 99% confidence level, showed that the performance of all four areas has significantly increased.
Data Envelopment Analyses
Abbas Jahangiri
Abstract
Data Envelopment Analysis (DEA) is a mathematical model that evaluates the relative efficiency of Decision Making Units (DMUs). The purpose of this paper was the systematic study of applying this technique in Iran Banking System. In this systematic review that was conducted on September 2017, initially ...
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Data Envelopment Analysis (DEA) is a mathematical model that evaluates the relative efficiency of Decision Making Units (DMUs). The purpose of this paper was the systematic study of applying this technique in Iran Banking System. In this systematic review that was conducted on September 2017, initially by searching keywords in scientific databases attempted to search the research has been conducted about DEA in Iranian banks regardless of the time of publication that a total of 409 research was found. Then 349 researches were removed from the study because of the irrelevant, repetitive and inaccessibility to the full text. Then attempted to statistical analysis of 60 remaining researches via Excel 2010 software. 80 % of the researches were published in 2009 onwards. Most research has been conducted in Tehran Province and Melli and Saderat banks. The variety of choices outputs and inputs indexes was very high. In 36.7 % of researches; the input-oriented model has used also in 36.7% of researches constant returns to scale is assumed. The results showed that although the interest of Iranian researchers in this field has increased, each with a particular view has analyzed the efficiency of the banks and have achieved different results.
Multi-Attribute Decision Making
Abbas Jahangiri; Mohammad Jahangiri
Abstract
Patients can determine the quality of services provided in hospitals. The purpose of this paper was assessment and ranking selected hospitals in terms of delivery quality of services in Iran. Firstly by a systematic research in various scientific databases attempted to find researches that have done ...
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Patients can determine the quality of services provided in hospitals. The purpose of this paper was assessment and ranking selected hospitals in terms of delivery quality of services in Iran. Firstly by a systematic research in various scientific databases attempted to find researches that have done about using SERVQUAL model in Iranian hospitals that 22 relative papers was found. Then with the help of the Weighted Aggregated Sum Product Assessment (WASPAS) method, Scores for each were calculated via Excel 2010 software. The most published researches in terms of time were related to the year 2016 and locally were related to Tehran province and the reliability index had the highest weight. Shahid Elmi field hospital in Zabol with score of 1.001 and D hospital affiliated to Qazvin University of Medical Sciences with score of 0.313 respectively, ranked first and last. Shahid Elmi field hospital in Zabol because of gain the top rank can be considered as a template for other hospitals under study. Also combining MADM with SERVQUAL can be used in order to assessment and ranking hospitals as a new method.