Now showing items 21-40 of 362

    • Buckling analysis of laminated composite beams by using an improved first order formulation

      Ayala, Shammely; Vallejos, Augusto; Arciniega, Roman (Trans Tech Publications Ltd, 2021-01-01)
      In this work, a finite element model based on an improved first-order formulation (IFSDT) is developed to analyze buckling phenomenon in laminated composite beams. The formulation has five independent variables and takes into account thickness stretching. Threedimensional constitutive equations are employed to define the material properties. The Trefftz criterion is used for the stability analysis. The finite element model is derived from the principle of virtual work with high-order Lagrange polynomials to interpolate the field variables and to prevent shear locking. Numerical results are compared and validated with those available in literature. Furthermore, a parametric study is presented.
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    • Data Visualization Techniques for Monitoring Real-Time Information of Cold Chain

      Rivas Tucto, Jerson; Castillo Talexio, Nora; Shiguihara Juárez, Pedro (Springer Science and Business Media Deutschland GmbH, 2021-01-01)
      Real-time monitoring of temperature is a critical factor in ensuring the integrity of food during the cold chain. In this work, we compare techniques related to real-time data visualization to contribute to more efficient monitoring of the cold chain. Three real-time data display attributes were evaluated, and we constructed a dataset based on the Frisbee database (CDD). In this paper, we proposed graphics containing different line and area techniques to be evaluated for a specialist. The proposed graphs contained the line and area techniques that, when performing the experiment, obtained a higher success rate compared to the auto-charting technique. However, it was evidenced that elements such as color facilitate the detection of anomalies and trends in temperature change due to its high percentage of effectiveness in the results.
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    • Sustainable Urban Drainage System to Avoid Flooding of Rain Origin and Improving Green Areas, Lima, Peru

      Amaro, López; Luis, José; Cuya, Villavicencio; Lorena, Raquel; Dávila, Silva; Rosana, Marisa (Springer Science and Business Media Deutschland GmbH, 2022-01-01)
      Lima’s Villa El Salvador is one of the cities of Peru with the highest population growth rate in recent decades, and still it is needing to develop many urban infrastructure services. However, this process of urbanization has also produced a decrease in the permeability of the terrain causing in recent years flooding and severe damages by the occurrence of heavy rains in the district. It was proposed the implementation of a sustainable urban drainage system (SUDS) to provide an engineering solution to this problem. It consists of a set of elements of the drainage network that will allow the collection, transport, retention, infiltration, and rainwater evacuation sustainably. Four SUDS alternatives were analyzed using well-founded methodologies to select the best alternative solution for the existing problem using technical, economic, and environmental criteria. The implementation of a retention tank and green ditches is the solution adopted to reduce the risk of flooding because of urbanization in the studied area. Runoff from the upper part of the basin will be collected through the green ditches, and the collected water will be distributed to increase the green spaces of the district. However, it will be necessary to supplement with irrigation to preserve them since this locality is climatologically arid. Successful storm water management requires integration with the urban and regional development plans.
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    • Inerter-added transmissibility to control base displacement in isolated structures

      Morales, Cesar A. (Springer Science and Business Media Deutschland GmbH, 2022-01-15)
      his paper proposes a Lean Green model for increasing profitability in small and medium-sized businesses operating within the plastics sector. This model will use the 5S methodology, KanBan for inventory control and TPM to standardize new corrective and preventive maintenance processes. As an added contribution, a Circular Economy process will be included to reuse products, thus reducing consumption and generating less solid waste. In this way, companies will not only prevent damaging the environment but will also guarantee their compliance with regulatory standards. As a result, an 11% reduction was observed in the acquisition of supplies and spare parts for machine maintenance along with a 4% reduction in the number of machine breakdowns.
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    • Predictive Model Influenced by External Factors to Reduce Uncertainty in the Budget Forecast of a Gold Mining Company

      Pillpe-Garcia, Cesar; Diaz-Huaina, Guillermo; Raymundo, Carlos (Springer Science and Business Media Deutschland GmbH, 2022-01-01)
      In this research we propose to apply the qualitative evaluation technique by points to the factors that influence the price of gold. In addition, we will simulate the context of 2015, a year in which the price of gold reached historical lows, and at the same time, a period in which the analyzed company was going through a period of crisis when seeing that its valuation was affected by the devaluation of its reserves and growth of debts with suppliers. The research was carried out for the forecast of the price of gold, the general budget of the company, the budget in the mine operations area and the budget of the plant operations area, but for reasons of space in the development of the paper we will only show the development with the price of gold and the area of operations in the process plant.
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    • Geostatistical Method Used in Quarry-Type Exploitation Based on Gaussian Simulation to Reduce the Uncertainty of Hydrogeological Values in Surface Mining in Peru

      Serrano-Rojas, Rafael; Muñoz-Orosco, Diego; Diaz-Huaina, Guillermo; Raymundo, Carlos (Springer Science and Business Media Deutschland GmbH, 2022-01-01)
      In this article the application of a geostatistical method based on Gaussian simulation is studied to reduce the uncertainty of atypical data related to the hydrogeological data of a quarry, for which the data of the hydrogeological model of the impact study was considered as a basis environment of a quarry. This research proposes the application of Gaussian Simulation to identify the data that generate uncertainties in the elaboration of the hydrogeological model; such as the identification of underground aquifer levels. This technique first develops the verification of the hydrogeological data, then identifies the outliers, which will allow a better application of the Gaussian Simulation technique with the Gaussian algorithm to obtain a more reliable hydrogeological model. Finally, it is geostatistically demonstrated that the application of the Gaussian simulation reduced the uncertainty of the hydrogeological model by 20%.
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    • Calculation of the Probability of Landslides Caused by Precipitation Applying the Janbu and MonteCarlo Method in Skarn-Type Mineral Deposits

      Castañeda, Carlos; Dibucho, Koseth; Arauzo, Luis; Raymundo, Carlos (Springer Science and Business Media Deutschland GmbH, 2022-01-01)
      In this research, we will focus on analyzing the influence of the rains on mining companies in the district of San Marcos in the department of Ancash, Peru. To do in this investigation, a stability analysis of slopes with limit equilibrium methods, being the Janbú the one selected for said study. On the other hand, it calculated the probability of failure of the slopes using methods probabilistic such as Monte Carlo. Such studies mentioned were applied with the help of the Slide software.
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    • Compressive Stress Analysis in an Underground Mining Geomechanical Model with Long Holes for Stability in Advance Work through Uniaxial Compression Tests

      Torres-Candia, Miguel; Alayo-Leon, Edgar; Aramburu-Rojas, Vidal; Raymundo, Carlos (Springer Science and Business Media Deutschland GmbH, 2022-01-01)
      Currently, the way of working was affected by the pandemic we are experiencing and mining is not exempt from this. For this reason, preventive action plans had to be implemented to restart operations in all areas involved in the mining sector. In the execution of these operations it is necessary to review the operating protocols and see if they are effective for the continuity of the mine as well as the stability at the time of exploitation. Mining is carried out under different methods depending on various geomechanical, geotechnical and design factors, where balance is sought. The different mining methods include cutting and descending fill with long underground drills. For this reason, the current geomechanical design should be reviewed in order to identify the stress values that indicate better stability and that have as a consequence the reduction of events caused by rock fall.
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    • Perceived risk and preferences of response and recovery actions of individuals living in a floodplain community

      Gomez-Cunya, Luis Angel; Tilt, Jenna; Tullos, Desiree; Babbar-Sebens, Meghna (Elsevier Ltd, 2022-01-01)
      Risk perception influences vulnerability to natural hazards in two key ways: 1) how an individual adapts to the risk, and 2) how a community responds and adjusts to these risks. Hence, risk perception plays a critical role in flood response and recovery policies for local communities. However, this perception variation among floodplain residents is not well understood, especially under varying flood threats. The research aimed to characterize how risk perceptions of varying flood threats diverged across groups of people living in floodplains and identify individuals' preferences for response and recovery actions. A household survey was conducted to determine residents' risk perceptions in the 1%- and 0.2% annual chance floodplain in Corvallis, OR. Contingency tables were used to evaluate relationships between respondents' sociodemographics, perceptions, and preferences for flood response and recovery actions. The results highlight that, even when households are exposed to similar threats of floodwater depths, survey respondents' risk perceptions and support for proposed response and recovery actions differed along sociodemographic lines. Understanding the nuanced relationships among socio-demographics, risk perceptions, and response and recovery actions can facilitate practical and better-informed approaches for community-relevant decision-making.
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    • System of Human Management Processes to Improve the Predictors of Staff Turnover in SMEs Dedicated to the Service Sector

      Morales-Rojas, Grecia; Uchida-Ore, Kaduo; Sotelo, Fernando; Rojas, José (Springer Science and Business Media Deutschland GmbH, 2022-01-01)
      Staff turnover is a consistent threat for companies, as the cost overrun generated by each rotated employee may be between 80% and 130% of an average salary. In Peru, small and medium-sized companies in the service sector have the highest turnover rate (19%). Therefore, it is necessary to strengthen the management of human talent within such types of enterprises and establish relevant mechanisms to curb or reduce the significant predictors of staff turnover. Thus, this paper proposes a system composed of three processes: Workload Distribution, Professional Growth and Development, Compensation and Rewards. For the conceptual validation, experts agree that the probability of success of the expected results of the system is greater than 75%. It can be concluded from this that the proposed system would reduce the probability of employees of SMEs in the service industry leaving the workplace.
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    • Lean Manufacturing Model for Production Management Under Design Thinking Approach to Increase Productivity of Musical Instrument SMEs

      Jimenez-Montejo, Jorge; Llachua-Cereceda, Diego; Elias-Giordano, Cynthia; Raymundo, Carlos (Springer Science and Business Media Deutschland GmbH, 2022-01-01)
      Currently, small- and medium-sized musical product businesses in Peru are in standstill due to low market demand. Under these conditions, venturing into a foreign market can be an option, where according to the reports of the Integrated Foreign Trade Information System (SIICEX), they received great acceptance in 36 countries amounting 497,391 US dollars, but the problem of higher productivity arises for a continuous export. Therefore, a lean manufacturing production management model needs to be developed under the design thinking approach to solve this issue. The proposed validation obtained a significant representation not only by promoting the product line but also in complying with high production standards of the different foreign countries. This study forms a research base to establish a production management model that benefits most SMEs in the 21st century.
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    • BPM Model of Design Management Under a Design Thinking Approach to Implement New Products in Textile SMEs

      Diaz-Cavero, Sebastian; Cano-Salazar, Jean; Raymundo, Carlos (Springer Science and Business Media Deutschland GmbH, 2022-01-01)
      Textile SMEs differ from others by their ability to generate garment designs according to current trends, this is the main competitive advantage of an SME in the field, however, design management refers to management problems from within every company. It seeks to establish a model that can improve the times, costs and satisfaction of workers who collaborate within the design management of textile SMEs, using a BPM management model under the Design Thinking approach, changing the focus of the Design Thinking tool to seek solutions within business problems through the BPM structure and its life cycle A case study was carried out for the validation of the model in a textile SME in Peru, the main results obtained were the improvement of times and costs in management design by 9% and 7%, respectively.
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    • Production Management Method Based on Agile Approach and Lean Manufacturing Tools to Increase Production Levels in Peruvian Metalworking MSMEs

      Portugal-Picon, David; Villavicencio-Arriola, Manuel; Cano-Lazarte, Mercedes; Raymundo, Carlos (Springer Science and Business Media Deutschland GmbH, 2022-01-01)
      In Perú, 90% of companies that employ 50 workers or less have an average life span of only 10 months in the market. This statistic is closely linked to informality and low productivity issues in such companies. Moreover, in March 2020, manufacturing production plummeted to 32.2% owing to low productivity levels exhibited by some companies. Therefore, to improve this situation, a production management method is required to enhance production management at metalworking MSMEs. This research work is based on the design and application of a production method based on lean manufacturing tools and agile methodologies to improve production process performance and meet market demands. Results revealed that manufacturing times reduced to 14.5 min, productivity increased by 30%, and the level of unfulfilled orders reduced by 30%.
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    • Lean Green Production Management Model Under a Circular Economy Approach for Reducing Variable Costs at a Small Plastics Business

      Diaz, Roberth; Gambetta, Marcelo; Rojas, Jose; Raymundo, Carlos (Springer Science and Business Media Deutschland GmbH, 2022-01-01)
      This paper proposes a Lean Green model for increasing profitability in small and medium-sized businesses operating within the plastics sector. This model will use the 5S methodology, KanBan for inventory control and TPM to standardize new corrective and preventive maintenance processes. As an added contribution, a Circular Economy process will be included to reuse products, thus reducing consumption and generating less solid waste. In this way, companies will not only prevent damaging the environment but will also guarantee their compliance with regulatory standards. As a result, an 11% reduction was observed in the acquisition of supplies and spare parts for machine maintenance along with a 4% reduction in the number of machine breakdowns.
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    • Cost of Sale Reduction in a Company Within the Restaurant Industry Using a Procurement Model Based on Supply Chain Management and Lean Philosophy

      Gutierrez-Yllu, Luiggi; Figueroa-Pomareda, Guido; Cano-Lazarte, Mercedes (Springer Science and Business Media Deutschland GmbH, 2022-01-01)
      This study mainly analyzes the increase in food and beverage (F&B) costs and its economic impact on business. Likewise, the related indicators that would cause this main indicator to increase were studied. The study was conducted and validated using a procurement simulation process of a specialized restaurant company belonging to a restaurant group. The results showed that the model proposed in the study reduces by 1.73% the main indicator of F&B cost; in addition, the related indicators are presented. Therefore, it can be confirmed that poor management, poor control of resources, such as supplies, and the absence of procurement strategies generate an excessive supply of resources to the restaurant or cause the loss of some supplies.
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    • Lean Maintenance Management Model, Based on TPM and 5S to Increase the Availability of Machines in the Plastics Industry

      Ferrua-Breña, Gabriel; Rivas-Marcatoma, Fiorella; Raymundo, Carlos (Springer Science and Business Media Deutschland GmbH, 2022-01-01)
      In a production system in the plastics industry, the implementation of the Lean Manufacturing tool is carried out with a view to reducing machine downtime, because there is a relatively low availability rate, which is generated by breakdowns constant and prolonged time in its restoration. With the application of the Total Productive Maintenance technique focused on the criticality analysis of modes, effects and failures. It seeks to reduce the six major losses of equipment, through the timely identification of the main causes of unforeseen breakdowns, which affects the availability of machines and their productivity and increases production costs. The Solution model will be implemented in three of these: First, the preparation stage. Then, the implementation stage that consists of the development of two methodology that is Total Productive Maintenance and 5S. Finally, the monitoring stage that allows the indicators to be compared with the improved line.
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    • Resource Management Model to Reduce Maintenance Service Times for SMEs in Lima-Peru

      Pinedo-Rodriguez, Katherine; Trujillo-Carrasco, Luis; Cabel-Pozo, Jhonatan; Raymundo, Carlos (Springer Science and Business Media Deutschland GmbH, 2022-01-01)
      Currently, companies engaged in maintenance and repair work are being affected due to the gradual increase in delays in their services. Consequently, an important economic impact has been generated in the sector, which is reflected in a 21% increase in its operating costs. After reviewing the literature, little information was found about the sector, due to which, the motivation is to carry out the study of a service SME in Lima, Peru. The proposed solution model comprises four phases: in the first phase, change management is developed, in the second phase, a study of the work is carried out, in the third phase, inventory management is applied, and in the last phase, they are standardized. The procedures previously developed. Based on this, it is possible to reduce costs by up to 12%, as well as reducing the number of delays by 15%.
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    • Inventory Optimization Model Applying the FIFO Method and the PHVA Methodology to Improve the Stock Levels of Olive Products in SMEs of the Agro-Industrial Sector in Peru

      Izaguirre-Malasquez, Rosysella; Muñoz-Gonzales, Lucia; Cabel-Pozo, Jhonatan; Raymundo, Carlos (Springer Science and Business Media Deutschland GmbH, 2022-01-01)
      Food industries face complicated inventory management problems, since the products are perishable, that is, after a certain time the product will no longer be edible. Therefore, the importance of this project is to optimize the inventory control of olive products in SMEs in the agro-industrial sector. Additionally, the goal of the research is to minimize inventory costs and the time it takes for products to reach their respective customers. For this, the indicators of inventory rotation, perfect deliveries, inventory accuracy and satisfied customers were established so that an increase in each of them was achieved and standardization was achieved efficiently. For this reason, the PDCA (plan-do-verify-act) methodology will be implemented, also known as the Deming cycle in the agro-industrial company in order to standardize the processes of reception, location, preparation and dispatch in the product warehouse finished.
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    • Production Management Model Based on Lean Manufacturing and SLP to Increase Efficiency in the Tapestry Manufacturing Process in Lima Manufacturing SMEs

      Anchayhua, Geraldine; Cevallos, Sharoon; Peñafiel, Juan; Raymundo, Carlos (Springer Science and Business Media Deutschland GmbH, 2022-01-01)
      Currently SMEs present many challenges such as competition with local markets, inefficiency in productivity, quality and services, representing a financial imbalance. In Peru, one of the main problems for SMEs is the lack of planned production and a poor distribution of work. These problems faced by all SMEs generate that entrepreneurs seek different ways to overcome the problems mentioned above applying different solutions to generate opportunities, providing greater productivity and establishing sustainability in companies. This article presents a case study in a small upholstery company that presents production efficiency problems where a production management model based on Lean Manufacturing and SLP will be implemented to achieve that capacity improves, productivity increases eliminating waste while minimizing waste. costs and activities within production in order to increase the flow of material rotation, managing to meet customer orders on time, both in the manufacturing and service industries.
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    • Production Planning and Control Model to Increase On-Time Deliveries Through Demand-Driven MRP and PDCA in a Make-to-Order Environment of Non-primary Manufacturing Industry

      Franco-Quispe, Daeli; Yauri-Tito, Diana; Cabel-Pozo, Jhonatan; Raymundo, Carlos (Springer Science and Business Media Deutschland GmbH, 2022-01-01)
      In recent years, production environments have gone from predictable to dynamic, therefore factors such as delivery time and a high percentage of customer satisfaction have become fundamental criteria for this new environment. Production planning and control (PPC) systems must be aligned with the new objectives of the manufacturers, however, the most popular PPC don’t satisfy their needs. This is how this article proposes a PPC model based on the Demand-Driven MRP system supported by the stages of the PDCA cycle so that it can perform optimally in dynamic environments such as make-to-order manufacturing models. As a result of the simulation in the case study, 100% compliance with deliveries on time was obtained and a reduction in lead time by 50.33%. Therefore, it is concluded that the proposed model is applicable and beneficial in this context.
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