Supply chain management
Alireza Goli; Mani Bakhshi; Erfan Babaee Tirkolaee
Abstract
Iran is among the ten disaster-prone countries and, in terms of the earthquake, it has been ranked the sixth in the world. Although the damages caused by the disasters are not irreversible from different aspects, they could be minimized by performing appropriate preventions as well as preparing plans ...
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Iran is among the ten disaster-prone countries and, in terms of the earthquake, it has been ranked the sixth in the world. Although the damages caused by the disasters are not irreversible from different aspects, they could be minimized by performing appropriate preventions as well as preparing plans to counteract the impacts of such incidents. According to the increasing trend of disasters and crises, which hardly damage businesses and communities, providing relief supply chain for crisis situations (HDRSC) is necessary and vital in the wide field of supply chain management (SCM). Even though considerable attempts have been performed in the field of supply chain focusing on the disaster relief, few studies have addressed its complex features and properties. This paper concentrates on the activities such as demand determination and supply chain coordination by field study and best review of best-related research. This research provides a framework for supply chain managers in crisis, who face similar problems in other environments, with valuable insights.
Payam Khosravi; Mehdi Alinaghian; Seyed Mojtaba Sajadi; Erfan Babaee Tirkolaee
Volume 2, Issue 1 , March 2015, , Pages 64-76
Abstract
Waste collection is a highly visible municipal service that involves large expenditures and difficult operational problems. In addition, it is expensive to operate in terms of investment costs (i.e. vehicles fleet), operational costs (i.e. fuel and maintenances) so that generating small improvements ...
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Waste collection is a highly visible municipal service that involves large expenditures and difficult operational problems. In addition, it is expensive to operate in terms of investment costs (i.e. vehicles fleet), operational costs (i.e. fuel and maintenances) so that generating small improvements in this area can lead to huge savings in municipal expenditures. Among the issues raised in the process of decisions making by managers and associated policy makers, one can point to determining the optimal weekly policies of waste collection. In this paper, the periodic capacitated arc routing problem (PCARP)in mobile disposal sites is described and the authors seek to determine the optimal routes of required edges (streets or alleys) per week, number and location of mobile disposal sites, and the number of required vehicles. We present two simulated annealing algorithms, which are different in cooling schedule and number of iterations of each temperature. To evaluate the performance of these algorithms on small-sized problems, the solver “CPLEX"in application “GAMS” is used. The experimental results show that the presented algorithms have appropriate performance and a reasonable time range.
