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        1 - An Integrated Approach for Facility Location and Supply Vessel Planning with Time Windows
        Mohsen Amiri Seyed Jafar Sadjadi Reza Tavakkoli-Moghaddam Armin Jabbarzadeh
        This paper presents a new model of two-echelon periodic supply vessel planning problem with time windows mix of facility location (PSVPTWMFL-2E) in an offshore oil and gas industry. The new mixed-integer nonlinear programming (MINLP) modelconsists ofa fleet composition More
        This paper presents a new model of two-echelon periodic supply vessel planning problem with time windows mix of facility location (PSVPTWMFL-2E) in an offshore oil and gas industry. The new mixed-integer nonlinear programming (MINLP) modelconsists ofa fleet composition problem and a location-routing problem (LRP). The aim of the model is to determine the size and type of large vessels in the first echelon and supply vessels in the second echelon.Additionally,the location of warehouse(s),optimal voyages and related schedules in both echelons are purposed.The total cost should be kept at a minimum and the need of operation regions and offshore installationsshould be fulfilled.A two-stage exact solution method, which is common for maritime transportation problems, is presented for small and medium-sized problems. In the first stage, all voyages are generated and in the second stage, optimal fleet composition, voyages and schedules are determined. Furthermore, optimal onshore base(s) to install central warehouse(s)and optimal operation region(s) to send offshore installation’s needs are decided in the second stage. Manuscript profile
      • Open Access Article

        2 - A Scientometric Analysis of Supplier Selection Research
        Athena Forghani Seyed Jafar Sadjadi Babak Farhang Moghadam
        Supplier selection (SS) is a decision-making process by which potential suppliers can be identified, evaluated, and ranked. Thus, multiple types of financial resources are used that can significantly contribute to the success of a firm. This study offers a broad view of More
        Supplier selection (SS) is a decision-making process by which potential suppliers can be identified, evaluated, and ranked. Thus, multiple types of financial resources are used that can significantly contribute to the success of a firm. This study offers a broad view of SS publications from 1973 to 2019 through scientometric analysis recruiting Scopus, the Elsevier’s abstract and citation database, as a primary search engine. The documents are also statistically classified in terms of different criteria. The research results indicate that publications have considerably grown over the past few years. Moreover, the most influential countries, institutions, journals, papers, authors, and collaborations in the field of SS literature are identified. Besides, the most-cited papers are thoroughly discussed. Finally, keywords are analyzed and hot research topics are presented. This study hopes to bring awareness to researchers, journal editors, and industries in future efforts. Manuscript profile