Olivares-Benitez, Elias
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Preferred name
Olivares-Benitez, Elias
Official Name
Olivares Benítez, Elias
Alternative Name
eolivaresb
Main Affiliation
ORCID
Scopus Author ID
55574580400
Researcher ID
R-7075-2018

Research Output
Now showing 1 - 10 of 39
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Matheuristics for the Design of a Multi-Step, Multi-Product Supply Chain with Multimodal Transport

2021 , Ruvalcaba-Sandoval, David A. , Olivares-Benitez, Elias , Rojas, Omar , Sosa-Gómez, Guillermo

Supply-chain network design is a complex task because there are many decisions involved, and presently, global networks involve many actors and variables, for example, in the automotive, pharmaceutical, and electronics industries. This research addresses a supply-chain network design problem with four levels: suppliers, factories, warehouses, and customers. The problem considered decides on the number, locations, and capacities of factories and warehouses and the transportation between levels in the supply chain. The problem is modeled as a mixed-integer linear program. The main contribution of this work is the proposal of two matheuristic algorithms to solve the problem. Matheuristics are algorithms that combine exact methods and heuristics, attracting interest in the literature because of their fast execution and high-quality solutions. The matheuristics proposed to select the warehouses and their capacities following heuristic rules. Once the warehouses and their capacities are fixed, the algorithms solve reduced models using commercial optimization software. Medium and large instances were generated based on a procedure described in the literature. A comparison is made between the algorithms and the results obtained, solving the model with a time limit. The algorithms proposed are successful in obtaining better results for the largest instances in shorter execution times.

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Operational Efficiency of Mexican Water Utilities: Results of a Double-Bootstrap Data Envelopment Analysis

2020 , Jose Humberto Ablanedo-Rosas , Aaron Guerrero Campanur , Olivares-Benitez, Elias , Sánchez-García, Jacqueline Y. , Núñez-Ríos, Juan E.

The objective of this paper is to estimate the operational efficiency of Mexican water utilities and identify the context variables that impact their efficiency. In particular, a bootstrap data envelopment analysis (DEA) and a bootstrap truncated regression analysis are combined in a two-stage research method. In the first stage, an input-oriented DEA model is used to determine bootstrap efficiency scores. Then, the corrected distribution function of the efficiency scores is used to estimate a truncated regression which is aimed to identify the significant influential context variables. Three categorical and two continuous context variables are considered in the analysis. Results show that only one context variable has a significant impact on the water utilities efficiency scores. Managerial recommendations are drawn from the analysis. It is suggested that water utilities continue or implement wastewater treatment, persist in decreasing and controlling leakage across the distribution network, and maximizing sewer coverage.

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Logistics 4.0 in the agri-food supply chain with blockchain: a case study

2023 , Rafael Granillo-Macías , Isidro J. González Hernández , Olivares-Benitez, Elias

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The Capacitated Lot Sizing Problem with Batch Ordering: A MILP and Heuristic Approach

2019 , Macedo Barragán, Gustavo , Nucamendi-Guillén, Samuel , Olivares-Benitez, Elias , Rojas, Omar

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Components to foster organizational resilience in tourism SMEs

2021 , Núñez-Ríos, Juan E. , Sánchez-García, Jacqueline Y. , Soto-Pérez, Manuel , Olivares-Benitez, Elias , Rojas, Omar

PurposeSmall- and medium-sized enterprises (SMEs) mainly rely on their structure and internal networks to achieve their goals and remain competitive. However, their limited internal capabilities and complex environments can hinder their stability. Thus, this study evaluated the relationships among specific factors toward fostering organizational resilience (OR) in tourism SMEs.Design/methodology/approachA multi-methodological approach was adopted to address this research study, including (1) social network analysis (SNA) to formulate the conceptual model and (2) construct validation through partial least squares path modeling (PLS-PM).FindingsThe six proposed hypotheses were supported. These results suggest that addressing these variables and relationships after considering management style and people development as critical factors can foster OR in tourism SMEs.Research limitations/implicationsThe ideas that were developed were constrained to the organizational domain. Although the results apply to the Mexican context, this limitation can be offset by extending the proposal to other emergent regions or organizations. This can also increase the generalization of the results and foster improvements in the approaches applied.Practical implicationsAcademics and managers must rethink resilience as the final state generated by multiple factors. This requires reconfiguring inner organizational interactions, providing more autonomy to operative units, reinforcing business intelligence and improving feedback mechanisms.Originality/valueThis research study contrasts previous studies because it proposes that SNA be exploited to avail of the advantages it confers in designing the conceptual model. In this regard, we present new relationships to promote OR and provide new avenues in order to improve the analysis of adaptation processes.

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Design of a Logistics Nonlinear System for a Complex, Multiechelon, Supply Chain Network with Uncertain Demands

2018 , Aaron Guerrero Campanur , Olivares-Benitez, Elias , Pablo A. Miranda , Rodolfo Eleazar Perez-Loaiza , Jose Humberto Ablanedo-Rosas

Industrial systems, such as logistics and supply chain networks, are complex systems because they comprise a big number of interconnected actors and significant nonlinear and stochastic features. This paper analyzes a distribution network design problem for a four-echelon supply chain. The problem is represented as an inventory-location model with uncertain demand and a continuous review inventory policy. The decision variables include location at the intermediate levels and product flows between echelons. The related safety and cyclic inventory levels can be computed from these decision variables. The problem is formulated as a mixed integer nonlinear programming model to find the optimal design of the distribution network. A linearization of the nonlinear model based on a piecewise linear approximation is proposed. The objective function and nonlinear constraints are reformulated as linear formulations, transforming the original nonlinear problem into a mixed integer linear programming model. The proposed approach was tested in 50 instances to compare the nonlinear and linear formulations. The results prove that the proposed linearization outperforms the nonlinear formulation achieving convergence to a better local optimum with shorter computational time. This method provides flexibility to the decision-maker allowing the analysis of scenarios in a shorter time.

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Decarbonization in Mexico by extending the charging stations network for electric vehicles

2023 , Francisco Ruiz-Barajas , Ramirez-Nafarrate, Adrian , Olivares-Benitez, Elias

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Factors to Foster Organizational Sustainability in Tourism SMEs

2020 , Núñez-Ríos, Juan E. , Sánchez-García, Jacqueline Y. , Rojas, Omar , Olivares-Benitez, Elias

Small and medium-sized tourism companies (SMEs) strongly depend on their collaborators to achieve competitiveness and sustainability. In this sense, these organizations need to identify those factors that help them to use their resources and efforts to achieve the aforementioned goals. This article proposes a model oriented to organizational sustainability in the tourism sector. A systemic approach was adopted to articulate this research; therefore, the soft systems methodology was applied to structure the problem and express a conceptual model that suggests relationships as an alternative solution to the expressed problem. Partial least squares path modeling was applied to statistically validate the relationships expressed in the construct. Results suggest that the relationships proposed in the construct are valid and may promote organizational sustainability. The ideas developed are restricted to the organizational domain and although the results apply in a Mexican context, this potential limitation can be offset by the multi-methodological approach proposed, extending the model’s application to other types of organizations. This study may enable scholars and managers to improve communication and inter-organizational relationships, allowing organizations to focus their strategies and efforts using systems thinking to increase responsiveness and adaptation.

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Book of abstracts CLAIO/CSMIO 2024 conference

2024 , Olivares-Benitez, Elias , Rodriguez-Escoto, Joel-Novi , M. Angélica Salazar-Aguilar , Paulina González-Ayala

El Book of Abstracts CLAIO/CSMIO 2024 es un compendio que incluye los resúmenes de las ponencias y estudios presentados en el XXII Congreso Latino Iberoamericano de Investigación Operativa (CLAIO) y el XII Congreso de la Sociedad Mexicana de Investigación de Operaciones (CSMIO). Este evento, celebrado del 28 de octubre al 1 de noviembre de 2024 en Guadalajara, México, reúne a investigadores y profesionales de Latinoamérica que trabajan en diversos campos de la Investigación Operativa. El libro contiene una amplia variedad de trabajos enfocados en temas de optimización matemática, simulación, inteligencia artificial, logística, programación estocástica, aprendizaje automático, transporte, gestión de la cadena de suministro, entre otros. Se presentan metodologías innovadoras, modelos y aplicaciones prácticas en diferentes áreas como la salud, el transporte y la sostenibilidad.

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A Formulation for the Stochastic Multi-Mode Resource-Constrained Project Scheduling Problem Solved with a Multi-Start Iterated Local Search Metaheuristic

2023 , Alfredo S. Ramos , Pablo A. Miranda-Gonzalez , Nucamendi-Guillén, Samuel , Olivares-Benitez, Elias

This research introduces a stochastic version of the multi-mode resource-constrained project scheduling problem (MRCPSP) and its mathematical model. In addition, an efficient multi-start iterated local search (MS-ILS) algorithm, capable of solving the deterministic MRCPSP, is adapted to deal with the proposed stochastic version of the problem. For its deterministic version, the MRCPSP is an NP-hard optimization problem that has been widely studied. The problem deals with a trade-off between the amount of resources that each project activity requires and its duration. In the case of the proposed stochastic formulation, the execution times of the activities are uncertain. Benchmark instances of projects with 10, 20, 30, and 50 activities from well-known public libraries were adapted to create test instances. The adapted algorithm proved to be capable and efficient for solving the proposed stochastic problem.

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