Razieh Taghipour; Soroush Avakh Darestani
Abstract
In recent years, maintenance has been recognized as an effective and a significant improvement tool in the performance of equipments. Maintenance plays an important role in maintaining reliability, availability and quality of products, risk reduction, efficiency increase and safety, so maintenance and ...
Read More
In recent years, maintenance has been recognized as an effective and a significant improvement tool in the performance of equipments. Maintenance plays an important role in maintaining reliability, availability and quality of products, risk reduction, efficiency increase and safety, so maintenance and its strategies have a special place in the industry. A lot of researches show the necessity of using fuzzy sets in decision making problems due to its high flexibility. The choosing maintenance strategy is also a problem with so many uncertainties so using fuzzy sets seems to be very useful. The aim of this research is to provide a suitable mathematical decision making model for assessment and selection maintenance strategies by using hierarchical fuzzy Axiomatic Design (HFAD) and hierarchical fuzzy Topsis (HFTOPSIS) in Haft Almas Co. Since many criteria such as added value, safety, and … so are vital in the maintenance strategy selection, in this article first these criteria are investigated in the literature review and expert's opinions, then for obtaining the weights of criteria the FAHP method is used and finally the strategies are ranked through the applying HFAD and HFTOPSIS. The results of FTOPSIS and FAD were compared in selecting a maintenance strategy. The results of comparisons indicate the similarity of rankings by two techniques. Above techniques show that TPM alternative has superior to other strategies.
Mohsan Shafiee Nick Abadi; Habib Farajpour Khanaposhtani; Hossein Eftekhari; Aliasghar Sadadadi
Volume 13, Issue 39 , January 2016, , Pages 35-62
Abstract
Today, companies have accepted that the maintenance and repairs are profitable business elements and therefore, the role of maintenance and repairs has become more important in modern manufacturing systems.Maintenance and repair play important roles in achieving organizational goals and improving the ...
Read More
Today, companies have accepted that the maintenance and repairs are profitable business elements and therefore, the role of maintenance and repairs has become more important in modern manufacturing systems.Maintenance and repair play important roles in achieving organizational goals and improving the indicators of reliability, reducing the equipment downtime, products quality, increasing productivity, safety equipment and etc. In this regard, the maintenance and repairs and their strategies have the particular importance in the industry. As a result, the main purpose of this study is selecting and ranking the best repairs and maintenance strategies using a combination of confirmatory factor analysis methods (FA), AHP and TOPSIS in oil refinery of Ray. According to that many variables such as safety, cost, added value, etc. are affective in choosing a maintenance and repairs strategy, in the present study at first has been identified these variables by the aid of literature review and experts opinion and then has been addressed to select the best maintenance strategy by AHP and TOPSIS techniques and try to offer suggestions for improving refinery maintenance system.
