Atefeh Salimi; Reza Tavakkoli Moghadam; Mehdi Bashiri
Volume 3, 1(4) , December 2016, , Pages 15-29
Abstract
Today the reverse logistics is one of the major activities of supply chain management that include all physical activities associated with returned products (e.g, sets, recovery and recycling, disposal and demolition). In this regard, concern about the environmental impacts of business activities lead ...
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Today the reverse logistics is one of the major activities of supply chain management that include all physical activities associated with returned products (e.g, sets, recovery and recycling, disposal and demolition). In this regard, concern about the environmental impacts of business activities lead to interest in supply chain design that is environmentally friendly. This article takes into consideration to minimize the environmental impact beside minimize the total cost of the basic model and the inherent uncertainty of input data. The basic model is considered to be a model plan to design a reverse logistics as a part of the supply chain in order to minimize the total cost for recycling urban solid waste. In dealing with uncertainty a scenario-based approach is used and the proposed model has been solved using GAMS software.
Atefeh Salimi; Reza Tavakkoli Moghadam; Mehdi Bashiri
Volume 2, Issue 3 , September 2015, , Pages 168-179
Abstract
The importance of social responsibility in organizational and business units have been increasingly stressed by the researchers in recent years. As the supply chain plays an important role in today's business environment, the issue of social responsibility must be carefully considered in designing and ...
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The importance of social responsibility in organizational and business units have been increasingly stressed by the researchers in recent years. As the supply chain plays an important role in today's business environment, the issue of social responsibility must be carefully considered in designing and planning supply chain.This paper considers the social responsibility to be one of the goals of designing the reverse logistics network for recycling large household waste in terms of uncertainty. To deal with the uncertainty in proposed model, scenario-based random planning is used, and the proposed model has been solved by using GAMS Software. Since the objective function value has been taken into consideration for the model of social responsibility as one of the objectives, the objective function value is more than basic model one; we tried to present an approach as a motivational factor for enterprises to move towards the adoption of social responsibility towards society.
Ehsan Hashemi; Reza Tavakkoli Moghadam; Mehdi Bashiri
Volume 1, Issue 4 , October 2014, , Pages 208-229
Abstract
The attestation towards environmental, statutory obligations and economic interests arising from rehabilitation operations in recent years has led to more focus on reverse logistics operations. To this end, integration of the design of reverse and forward logistics networks which results in prevention ...
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The attestation towards environmental, statutory obligations and economic interests arising from rehabilitation operations in recent years has led to more focus on reverse logistics operations. To this end, integration of the design of reverse and forward logistics networks which results in prevention of sub optimality due to separated design of these networks is of high significance. This model discusses a mixed-integer nonlinear programming model for the integrated design of multi-level and multi-commodity forward-reverse supply chain network. In the end, the calculation results of the proposed model solution have been presented via GAMS software in order to locate facilities, determine the relationship between facilities and raw material procurement rate and production rate. The result of the solved multi-purpose models has corroborated the single-purpose models and it shows the efficiency of the used methods.
Farhad Yazdani; Reza Tavakkoli Moghadam; Mehdi Bashiri
Volume 1, Issue 3 , September 2014, , Pages 180-197
Abstract
In recent years, reverse logistics has received more attention by researchers due to governmental regulations, environmental issues and social responsibilities. This paper deals with the design of a multi-product closed-loop supply chain network, in which some production centers experience minor and ...
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In recent years, reverse logistics has received more attention by researchers due to governmental regulations, environmental issues and social responsibilities. This paper deals with the design of a multi-product closed-loop supply chain network, in which some production centers experience minor and general disruptions. The proposed network has three levels in the forward direction (i.e., suppliers, plants and distributors) and three levels in the reverse direction (i.e., collection centers, redistribution and disposal). Initially, plants prepare their needed raw materials from the suppliers; after production in plants, the final products are delivered to customers through distribution centers, percentage of these products are collected from customers by collecting centers. In the collection centers, the percentage of products is returned to manufacturing factories for recycling, percentage of them is sent to redistribution centers for sale to secondary customers, and the percentage that does not possess any capability of the cited items will be sent to disposal centers. The mathematical model presented in this study is a bi-objective mixed-integer nonlinear model while maximizing the profit, the delivery time to customers will be minimized. For validation of the model, a numerical example is provided by Pareto curve, in which the profit is versus the time.
