Facultad Regional Santa Fe

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Author: search.filters.author.Vecchietti, Aldo RodomiroHas files: Yes

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    A soybean supply chain model to analyze the greenhouse gas emissions of the transport sector
    (Computer Aided Chemical Engineering (Book Series), 2022-05-12) Verrengia, María de los Milagros; Vecchietti, Aldo Rodomiro
    This article presents a mathematical model of the soybean´s supply chain for Argentina where the different stakeholders and the material flows among them are represented. The transport used in this sector are trucks, trains, and river ships. The objective is to analyze the emissions of greenhouse gases (GHG) generated by the transportation in this sector using electric trucks as an alternative to biodiesel ones. The model generated is a mixed multi-period / multi-objective linear integer model, destined at minimizing operating and GHG emissions cost. The accuracy of the model is compared against two statistical studies made by the Transport Agency of Argentina in 2014 and 2017 regarding the soybean transportation. The results show a good fit with those reports. Two scenarios are compared, in the first one only biodiesel trucks are used for transportation, while in the second one trains, barges and electric trucks are included. Results show the tradeoff between investment costs and reduction of emissions where it is possible to achieve a 60% GHG decrease, which is far to compensate for the investment cost.
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    A disjunctive model to analyze and redefne the logistic of replenishing goods of retailing stores
    (Optimization and Engineering, 2022-02-09) Flores, Julio Rolando; Cúnico, Maria Laura; Vecchietti, Aldo Rodomiro
    This paper analyzes the distribution logistics for a retail business that has hundreds of stores located long distances from their warehouses. Given narrow revenue margins, retail companies must optimize the cost of the merchandise delivery to its stores. In general, the structure of the distribution consists of warehouses that concentrate goods which are then delivered to the stores according to a replenishment policy that contemplates its characteristics and location. The cost of the distribution logistics is signifcant and deserves special consideration. This paper presents a disjunctive multi period model to redesign the logistic infrastructure of delivering goods from warehouses to stores located in a wide geographical region. In the model, a warehouse can be installed, closed, expanded or replaced by a cross-docking terminal. The objective function is to minimize the cost of the whole distribution operation. A case study is presented to show the model capabilities.