• Adoption of snowball sampling technique with distance boundaries to assess the productivity issue faced by micro and small cocoa producers in Cusco

      Jalca, Angie; Lopez, Marco; Sotelo, Fernando; Raymundo, Carlos (Springer Verlag, 2020-01-01)
      The food supply chain has gained impulse over the past few years induced by the rising global demand for food; therefore, much emphasis is placed upon examining this class of supply chains. It also faces constant production, storage, and distribution challenges, wherein the key link for proper operation is the farmer, who engages in the agricultural sector, heavily impacted by low crop productivity, which interfer with economic development at a national level. Consequently, it is important to assess those farmers who belong to micro and small enterprises in the agricultural sector. Due to the characteristics of the population, a nonprobability sampling technique was used to assess micro and small cocoa producers in La Convención Province, Cusco, Peru. To such end, a snowball sampling model with distance boundaries was adopted because the population is unknown and hard to reach.
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    • Application of Lean Techniques to Reduce Preparation Times: Case Study of a Peruvian Plastic Company

      Silva Reyes, Alfredo Jeampiere; Salas Castro, Rosa Fernanda (Research India Publications, 2017-11)
      This article examines the problem of an increase in product returns for a company that produces plastic films for flexible packaging. Among the factors that have resulted in the increase of returned products are defects in the films caused by the poor manipulation of materials and, above all, the hard point in the coils caused by excessive extruder preparation time, causing the extrusion head to overheat as well as uneven extrusion. Extrusion is a key process in the production of plastic materials as it transforms polypropylene and additives into plastic sheets. The delay in the preparation time caused by machine operators leads to the overheating of the extrusion head and, therefore, defective products that are ultimately returned to the company by customers. In order to confront this problem, a proposal was developed using the SMED tool of Lean Manufacturing in order to reduce the preparation time of the extruder and to increase the productivity of the company. For the validation of the proposal, we simulated the system to determine the resulting reduction in extruder preparation time.
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    • Implementation of a quality management system (QMS) based on TQM principles for Cocoa MSEs: A case study in Cusco, Perú

      Wong, Edgar; Pajuelo, Gianpierre; Sotelo, Fernando; Raymundo, Carlos (Springer Verlag, 2020-01-01)
      The objective of this work is to develop a quality management system focused on the principles of TQM for cocoa micro and small enterprises (MSEs) in the province of La Convención, Cusco - Perú. The diagnosis for this investigation was made using in-depth interviews to the cocoa farmers that facilitated the identification of the current situation of cocoa MSEs. With the results obtained and based on the scientific articles studied, the critical elements in each activity related to the cocoa production process were determined, and it is focused on establishing a quality management system adaptable to the requirements of the plots studied. As a result of the analysis of the experts, the system in question is based on the following principles of TQM: documentation, customer focus, process-based approach and continuous improvement.
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    • Improvement of the manufacturing of aluminum pots using lean manufacturing tools

      Cusihuallpa-Vera, Ximena; Suarez-Montes, Evelyn; Quiroz-Flores, Juan; Alvarez, Jose (Springer, 2021-01-01)
      The research is based on the problems encountered in the production process of companies in the metalworking sector. The problem arises from the low availability of machines in the production process due to working conditions (39.5%), poor maintenance management (40.3%) and poor-quality control (20.2%) that generate low profitability for business. As a solution, Lean Manufacturing tools are implemented to improve the process and increase profitability. The improvement proposal consists of a series of stages: first, the definition of indicators for the measurement of the variables; then, the design and implementation of a pilot in the production process and, in parallel, a simulation system will be designed to evaluate the long-term results. The document concludes that the implementation of the proposed tools will increase the availability of machines and an OEE to 55%, avoiding defective products and reducing reprocessed products by 4%.
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    • Management model for pecan production using process tools in an MSE in Peru

      Muñante, Alejandra; Reyes, Fabrizio; Sotelo, Fernando; Raymundo, Carlos (Springer Verlag, 2020-01-01)
      The following study proposes a production management process model based on good practices and developed with process management tools for increasing crop productivity of pecan nuts using the Ica region in the district of Pachacutec as a study area. The study covers the proposed model’s diagnosis and development. The relation between these stages is the main function of improving pecan orchard productivity. The study showed that to increase pecan productivity from 1.09 (t/ha) to 2.21 (t/ha), and to determine raw material needs, tools and/or labor, a standardized process is needed for pecan production. The study’s main contribution is the development of a production management process through which farmers can order and control production by means of indicators. Furthermore, the study proposes that the developed process of pecan production currently applied by farmers should be supported by a mathematical model simulation.
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    • Poka-Yoke Model for Controlling Unit Entering and Fall Reduction in the Transportation of Toilets

      Roca-Ramos, Luis; Vargas-Zamalloa, Piero; Carvallo-Munar, Edgardo; Salas-Castro, Rosa; Cardenas-Rengifo, Luis (2021-01-01)
      Small and medium toilet manufacturing businesses in Peru face significant problems such as low productivity because of a high rate of production losses. To address this issue, the present study proposes the application of a lean manufacturing technique, such as the Poka-Yoke model, which improves the production flow within the company by implementing a transportation cart with a safety system to help reduce material falls during the manufacturing process. The results showed a 24% increase in productivity and reduction in problems of damaged products that did not meet quality standards, thus preventing their subsequent reprocessing.
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    • Production Control Model Using Lean Manufacturing Tools and Kanban/CONWIP Systems to Improve Productivity in the Process of Sand Casting in a Heavy Metalworking SME

      Prada-Echevarría, Luz; Chinchay-Grados, Jorge; Maradiegue-Tuesta, Fernando; Raymundo, Carlos (2021-01-01)
      The contribution of the metalworking sector to the gross domestic product is decreased by 8.6% in the 2017–2018 period because of problems such as high rejection rates, lead times, and raw material losses. Consequently, the sector’s production was reduced by PEN 1,200,000 while demand remained flat. Thus, this article proposes a production control model using 5S, Single-Minute Exchange of Dies, and tools such as Kanban and Constant Work-in-Progress (CONWIP) to increase the productivity of a sand casting line in a Peruvian metalworking enterprise that manufactures parts for mining on request. The improvement proposal involves the implementation of lean manufacturing tools and analyzes low productivity effects. The problems identified are typical of the Peruvian metalworking sector; thus, this study may contribute to finding possible solutions for issues faced by other enterprises.
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    • Production Management Model Based on Lean Manufacturing Focused on the Human Factor to Improve Productivity of Small Businesses in the Metalworking Sector

      Huamán, Jonathan; Llontop, José; Raymundo, Carlos; Dominguez, Francisco (Springer Verlag, 2020-01-01)
      Micro and small businesses in the metalworking sector present a high percentage of informality, and the majority of their production processes are not documented nor standardized. The production approach of Toyota, the enterprise-resource-planning system, and the lean manufacturing system were created for large organizations with sufficient financial resources to successfully implement these models. However, the human factor is a critical component in implementing these models. Therefore, a production management model has been proposed, which is based on lean manufacturing and focuses on the human factor, to increase productivity in the production area of a metalworking company, a small business. The result was that the company’s mentality changed, reaching a productivity of 70% through the use of lean manufacturing tools in the production area.
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    • Production process optimization model to increase productivity of microenterprises in the industrial chemical sector using 5s and tpm

      Chancahuana-Palomino, Leonardo; Ortiz-Licas, Alondra; Altamirano-Flores, Ernesto; Aderhold, Daniel (Springer, 2021-01-01)
      The industrial chemical sector has grown during the last years in the Peruvian market, becoming highly competitive since it represents the second main activity in the manufacturing industry. However, companies belonging to the sector have experienced a decrease in productivity, since it has a lower production rate than other economic sectors. This paper presents a model for increasing the productivity of companies in the sector. For this, the 5S and TPM techniques will be used sequentially. First, 5S techniques are applied to reorder the working area and to create a clean and safe environment for operating personnel. Then, the TPM technique is used to focus on reducing the deficiencies that machines present through preventive maintenance and raise awareness and involve operational personnel in the daily activities of autonomous maintenance. For validation of the model, a simulation with the software Arena is performed. Results show an increase of about 15% in productivity, the cycle time reduces by 14%, the OEE will increase by 24% and daily production by 15% in the paint line.
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    • Proposal for the application of ICE and BIM sessions to increase productivity in construction

      Quiso, E.; Rivera, J.; Farje, J. (IOP Publishing Ltd, 2021-02-18)
      Several studies have shown that the main problem in the construction industry is low productivity. Therefore, this study focuses on developing a proposal through a methodology that can increase productivity in the construction of buildings. The proposed methodology is Virtual Design and Construction (VDC), which has 4 pillars: Building Information Modeling (BIM), Integrated Concurrent Engineering (ICE), metrics and Project Production Management (PPM). However, the article mainly develops BIM and ICE sessions. In addition, in the ICE sessions, "work executors"will be added, so that the information is fed back by both parties, specialist engineers and work executors. Finally, the proposal will be applied in a multi-family building project in the city of Lima - Peru, in order to obtain improvement results.
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