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1
artículo
Distribution logistics is an essential factor of a company’s success by virtue of its great impact not only on logistical performance, but also on logistics costs. For this reason, it deserves special attention. This paper presents a model-based analysis of the distribution logistics potential, with the aim of detecting the logistical and monetary potential within a company. Moreover, further research activities are identified in order to expand and improve the developed method.
2
artículo
The Retail sector has increased steadily internationally and this is reflected in the 5.7% growth in the top 250 global Retail companies which have benefited from the implementation and positioning of E-Commerce. In the Peruvian market is estimated that the Retail sector will grow by 4% this year and the increase in demand showed difficulties in distribution, causing the long delivery times of orders as a problem. For this reason, the proposal developed a distribution and transport model applying Lean Logistics, with a Cross-Docking system, and for the registration and tracking of orders the Bar Code Poka Yoke, with the aim of increasing the service level to 92% order delivery, reducing the time for Store Pickups by 48.71%. The effectiveness of the model was corroborated through a simulation that allows the company to be competitive in the market.
3
artículo
Publicado 2012
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The Vehicle Routing Problem considers the design of sets of minimal cost routes, from an originated point knowned as deposit to an ended point. In this problematic situation, a key element in delivery systems is the sequencing of transport units, determined by the requirement of customers. The aim of this article is to present a new method of solving the problem of allocation of routing companies with the need to distribute products, through new models that use different algorithms. The model designed from the analysis of a set of metaheuristics, develop viable options to solve the daily problem of how to allocate and distribute products, from the company to customers, with efficiently and effectively ways.
4
tesis de grado
Publicado 2024
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The health crisis that our country is going through is very difficult to manage and vaccination is of utmost importance to counteract it; however, the logistical process of purchasing and distributing vaccines is very complex. Objective: Therefore, the present research article aims to design a predictive model that influences the logistic response planning for COVID 19 vaccination in the district of San Juan de Lurigancho. Methods: This can be achieved using geographic information systems technology and the implementation of mobile vaccination centers. Results: The results obtained showed the lack of vaccination sites in the district and how this measure generates a great benefit in the most vulnerable population of the study district. In addition, it is positive the results obtained compared to the results of other articles. Conclusions: It is confirmed that the logistic process of vacc...
5
artículo
Purpose: This paper aims to present a literature review of the most recent optimisation methods applied to Credit Scoring Models (CSMs). Design/methodology/approach: The research methodology employed technical procedures based on bibliographic and exploratory analyses. A traditional investigation was carried out using the Scopus, ScienceDirect and Web of Science databases. The papers selection and classification took place in three steps considering only studies in English language and published in electronic journals (from 2008 to 2022). The investigation led up to the selection of 46 publications (10 presenting literature reviews and 36 proposing CSMs). Findings: The findings showed that CSMs are usually formulated using Financial Analysis, Machine Learning, Statistical Techniques, Operational Research and Data Mining Algorithms. The main databases used by the researchers were banks an...
6
tesis de grado
Publicado 2024
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Actualmente, el servicio de food trucks se encuentra en crecimiento debido al cambio de hábitos de consumo de comida rápida de clientes. El propósito de la investigación es comprobar la lógica de utilización de la logística urbana para mejorar la optimización de abastecimiento de food trucks. La presente investigación propone realizar un caso de estudio en donde se plantea métodos de optimación de ruta, ubicación céntrica y la estimación del impacto ambiental a través de la emisión de gases contaminantes al momento de realizarse el abastecimiento de food trucks; se utilizó el software RStudio y COPERT V para la obtención de resultados cuantitativo. Con respecto a los resultados, se obtuvo que el food truck es viable debido al número de clientes potenciales dentro de la zona del caso de estudio. Se encontró la ubicación céntrica (longitud, latitud) del food truck den...
7
artículo
Publicado 2020
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Introduction: The population is susceptible to COVID-19 and knowing the most predominant characteristics and comorbidities of those affected is essential to diminish its effects. Objective: This study analyzed the biological, social and clinical risk factors for mortality in hospitalized patients with COVID-19 in the district of Trujillo, Peru. Methods: A descriptive type of study was made, with a quantitative approach and a correlational, retrospective, cross-sectional design. Data was obtained from the Ministry of Health’s database, with a sample of 64 patients from March to May 2020. Results: 85,71% of the total deceased are male, the most predominant occupation is Retired with an 28,57% incidence, and an average age of 64,67 years. When it came to symptoms of deceased patients, respiratory distress represents the highest percentage of incidence with 90,48%, then fever with 80,95%, ...
8
artículo
Estimation formulas have been established for the establishment of body surface area (BSA), using live weight (LW) and body length for calculation. The objective of this work was to compare four estimation formulas of the BSA – Mitchell [0.09 × LW0.69], Brody [0.14 × LW0.57], Johnson et al. [0.235 × LW0.49], Moulton [0.158 × LW5/8] and Hogan and Skouby [LW0.4 × (body length)0.6 × 217] – and three non-linear models – logistic [–y=a/(1 + be-cx)], Gompertz [y=a*exp(b*exp(cx))] and von Bertalanffy [y=a(1-be-cx)] – in terms of their ability to describe the growth of BSA in beef cattle and to detect the best estimator. Fifty-three meat cattle (20 males and 33 females) were used, mostly “Bruna dels Pirineus” and their crosses, with ages between 205 and 407 days, estimated live weight of 543±74 kg, which were slaughtered in a commercial abattoir. After the skinning, a photog...
9
artículo
Publicado 2020
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The objective of the work was to develop a mathematical model to analyze the behavior of mortality in the People’s Republic of China caused by COVID-2019. The logistic model was applied to the data reported in Table 1, between January 11 and April 12, 2020. The model formulated was linearized and presented in two forms, which, with the same value of B, introducing a correction factor for the independent variable, t, which serves as “period” and applying the method of minimum squares, the parameters A, k and r were determined, obtaining the respective model (Equation 10), which was analyzed with Pearson’s correlation coefficient, obtaining the correlation coefficient r=-0.9668 and the determination coefficient r^2×100=93.48 %; deducing the best estimate of the model to the process in modeling (Equation 10) to analyze the mortality phenomenon. Likewise, the mortality rate was eval...
10
artículo
Publicado 2018
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Para el establecimiento del área corporal (Body Surface Area, BSA) se han establecido fórmulas de estimación que parten de peso vivo (PV) y longitud corporal para su cálculo. El objetivo de este trabajo fue comparar cuatro fórmulas de estimación de la BSA – Mitchell [0.09 × PV0.69], Brody [0.14 × PV0.57], Johnson et al. [0.235 × PV0.49], Moulton [0.158 × PV5/8] y Hogan y Skouby [PV0.4 × (longitud corporal)0.6 × 217] – y tres modelos no lineales – logístico [y=a/(1+be-cx)], Gompertz [y=a*exp(b*exp(cx))] y von Bertalanffy [y=a(1-be-cx)] – en cuanto a su capacidad para describir el crecimiento de la BSA en bovinos de carne y detectar la mejor estimación. Se trabajó con una muestra de 53 bovinos de aptitud cárnica (20 machos y 33 hembras), mayormente Bruna de los Pirineos y sus cruces, con edades entre 205 y 407 días, peso vivo estimado de 543±74 kg, sacrificados en...
11
artículo
Publicado 2020
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This article offers a study of a retail footwear chain in Lima that uses the K-map method in its operations management. Its objectives are to verify if there is a positive impact on growth at the company’s points of sale, and to establish a relationship between the posed variables, considering the benefits of using the K-map method. The purpose of this study is to determine if this model promotes an increase in retail sales and if it is possible to recommend its use based upon hypotheses testing. This paper analyzes key performance indicators (KPIs) collected from six megastores to conduct normality, homogeneity, Pearson correlation and logistic regression testing. Results predict the relationship between variables and their influence on store growth with an efficacy of 83.3%.
12
artículo
Publicado 2006
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In this work, we try to find factors that determine the export continuity of Peruvian apparel exporters. Logistic regression has been used because it gives several advantages over other methods where the outcome variable is dichotomous or continuous with few values. Logit model exhibits significant interactions which have been deeply analyzed. Likewise, it was possible an exhaustive residual and goodness-of-fit analysis. Finally, we could validate the model for forecast of export continuity in 2006.
13
tesis de grado
Publicado 2023
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Logistics is an area that determines, in many cases, the prosperity of a company. Regardless of its size, the search for new tools, procedures and management techniques has increased in recent years. In the mining sector, the 49,9% of companies do not have an inventory control mechanism; therefore, a low turnover of this. This can be for three reasons: inefficient purchasing policy, inadequate demand planning, and inadequate storage method. For this reason, a model conformed by the following tools was developed: ABC classification, JIT, MRP, and inventory management. Likewise, the Arena Software was used in an SMEs that imported drill bits for the mining industry to validate the described model. The results were a 62% improvement over the purchasing policy, a 73% decrease in cycle time, and only the use of one worker for theimport process, allowing the other worker to be in another area....
14
artículo
Publicado 2023
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Background: Clinical management to maintain or restore oral health through the use of drugs during pregnancy is crucial, since at this stage physiological changes significantly influence the absorption, distribution and elimination of the drug, considering also that excessive administration of drugs during this period may have adverse effects on the mother and/or fetus. Therefore, the aim of the present study was to evaluate the factors associated with knowledge of pharmacological management of pregnant women in dental students of a Peruvian university located in the capital and province. Methods: This analytical, cross-sectional, prospective and observational study assessed 312 Peruvian dental students from third to fifth year of study between February and April 2022. A validated questionnaire of 10 closed questions was used to measure knowledge about pharmacological management in pregn...
15
artículo
Publicado 2020
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Introduction: The population is susceptible to COVID-19 and knowing the most predominant characteristics and comorbidities of those affected is essential to diminish its effects. Objective: This study analyzed the biological, social and clinical risk factors for mortality in hospitalized patients with COVID-19 in the district of Trujillo, Peru. Methods: A descriptive type of study was made, with a quantitative approach and a correlational, retrospective, cross-sectional design. Data was obtained from the Ministry of Health’s database, with a sample of 64 patients from March to May 2020. Results: 85,71% of the total deceased are male, the most predominant occupation is Retired with an 28,57% incidence, and an average age of 64,67 years. When it came to symptoms of deceased patients, respiratory distress represents the highest percentage of incidence with 90,48%, then fever with 80,95%, ...
16
objeto de conferencia
Publicado 2023
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The main objective of this research article is to optimize costs and logistic KPIs applying an economic order quantity (EOQ) inventory model in a metal-mechanic MSE with intermittent demand. Firstly, the forecast model with the lowest MAD and ECM is selected. The object under study, after ABC classification, belongs to the family of products located in class A due to its valuation and participation in the inventory. The Croston method is considered the most effective forecast model. Secondly, an aggregate planning is developed to satisfy the projection. Then, the EOQ or Wilson model is implemented to reduce inventory costs. Finally, to validate the calculated data, a simulation model is built in Arena with 50 replications. As a result, the inventory costs were reduced to 22.6%.
17
tesis de grado
Publicado 2023
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El presente trabajo propone un modelo logístico para el cálculo del abastecimiento de una empresa peruana importadora y distribuidora de materiales de construcción que actualmente no cuenta con un método estructurado para la planificación de su abastecimiento. En consecuencia, se ha identificado que la empresa tiene altos índices de rotura de stock que genera la pérdida de ventas por falta de stock. La metodología empleada para la investigación fue el enfoque cualitativo con un tipo de investigación aplicada de diseño transversal, apoyándose de entrevistas y una amplia revisión bibliográfica. Se plantearon alternativas para solucionar el problema, basándose en antecedentes como: Modelo logístico para MYPES, Sistema P, Sistema EOQ y Lean Production. Finalmente, se concluyó que el mejor método para calcular el abastecimiento en una empresa importadora de materiales de con...
18
artículo
Publicado 2022
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Background: Breast cancer incidence in the United States is lower in Hispanic/Latina (H/L) compared with African American/ Black or Non-Hispanic White women. An Indigenous American breast cancer-protective germline variant (rs140068132) has been reported near the estrogen receptor 1 gene. This study tests the association of rs140068132 and other polymorphisms in the 6q25 region with subtype-specific breast cancer risk in H/Ls of high Indigenous American ancestry. Methods: Genotypes were obtained for 5,094 Peruvian women with (1,755) and without (3,337) breast cancer. Associations between genotype and overall and subtype-specific risk for the protective variant were tested using logistic regression models and conditional analyses, including other risk-associated polymorphisms in the region. Results: We replicated the reported association between rs140068132 and breast cancer risk overall ...
19
artículo
Publicado 2021
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The COVID-19 pandemic has generated much concern worldwide. Due to its high transmissibility, many young university students have had to carry out their academic activities in mandatory social isolation, which could generate excessive anxiety. Therefore, the aim of this study was to evaluate the anxiety levels in Peruvian dentistry students developed during COVID-19 mandatory social isolation. Materials and Methods: An analytical, observational, and transversal study was carried out in 403 dentistry students in the last two years from three Peruvian universities from May to July 2020. The Zung Self-Rating Anxiety Scale was used to detect anxiety symptoms and their respective diagnoses. A logit model was used to evaluate the association of the variables: age group (X1), gender (X2), type of university (X3), and marital status (X4), with the anxiety levels of the students, considering a p-...
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