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Sensor Based Fixture Design and VerificationPurushothaman, Radhakrishnan 21 January 2003 (has links)
The objectives of Sensor Based Fixture Design and Verification (SFDV) research are to provide the means for detecting contact failure of the workpiece with fixture locators and for preventing incorrect loading of the workpiece in a fixture. The fixtures that involve complex free-form surfaces especially in the aerospace industries face problems caused by the contact failure of the workpiece with locators. In batch and mass production defects often occur due to incorrect loading of the workpiece in a fixture by an operator due to fatigue or inadvertence. The current fixturing research is focussed on improving the fixture quality and other aspects and do not address these issues. This research is focussed on three areas, to generate algorithms for automatically foolproofing the fixtures, to build locators with embedded sensors that could be used to verify the contact and foolproof the existing fixtures, and to design and experimentally validate fixtures for free-form surfaces with sensors to verify the location. In foolproofing, workpieces were classified into different categories to identify the existence of a solution and the geometry was simplified and used to search for a solution based on symmetry/asymmetry to discover a foolproofing location. The algorithms were implemented in a CAD software and the solutions were verified in 3D space. The locators with inbuilt sensors were designed for foolproofing and location verification purposes and the sensors were used in case studies to establish credibility. A sensor based fixture design method is created for the part location of free-form surfaces using fiber optic sensors. An experimental fixture with sensors incorporated in the locators was used to determine the effects of surface curvature on the sensitivity of the sensors. A new theory on best locations for the sensor based locators by utilizing surface curvature is proposed based on the experimental results. The SFDV implementation may help realize the dream for any manufacturing system aspiring to move beyond the six sigma levels of quality and achieve zero defects.
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Propuesta para mejorar la operatividad de alumbrado público de Luz del Sur S. A. A aplicando la metodología Lean Service / Proposal to improve the operation of public lighting at Luz del Sur S.A.A applying the Lean Service MethodologyCárdenas Cervantes, Deivi Jordhan, Chirinos Trujillo, Jimmy Ysaac 05 December 2021 (has links)
El presente trabajo de investigación tiene como objetivo mejorar la operatividad de alumbrado público en la empresa Luz del Sur S.A.A. Se identificaron las causas principales y para ello, se aplicó la metodología del Lean, cuyas herramientas y metodologías nos permitirá brindar una propuesta de solución sólida a la problemática actual antes mencionada. Primero se realizó la revisión bibliográfica, citando fuentes y artículos científicos que sustente y avalen la investigación. Luego, se realizó el análisis de la problemática actual y determinación de las causas, en donde se aplicaron métodos y herramientas de la ingeniería industrial para evidenciar la causa raíz del problema. A consecuencia de este análisis se formula la hipótesis para la aplicación del Lean con la ayuda de las herramientas Estandarización, VSM, Jidoka, Kaizen, Estudio de tiempos y Poka Yoke, quienes permitirán mitigar el impacto económico y operativo del problema principal los cuales son disminuir los sobre procesos y reducir las atenciones fuera de plazo en la operatividad del alumbrado público. Finalmente aplicando las mejoras descritas se puede ahorrar hasta en un 11.49% del presupuesto del área de OAP y estar dentro del estándar de trabajo según Osinergmin. / The present research work aims to improve the operation of public lighting in the company Luz Del Sur S.A.A. The main causes were identified and for this, the Lean methodology was applied, whose tools and methodologies will allow us to provide a solid solution proposal to the current problem mentioned above. First, the bibliographic review was carried out, citing sources and scientific articles that support and endorse the research. Then, the analysis of the current problem and determination of the causes was carried out, where industrial engineering methods and tools were applied to show the root cause of the problem. As a result of this analysis, the hypothesis for the application of Lean is formulated with the help of the tools like Standardization, VSM, Jidoka, Kaizen, Time Study and Poka Yoke, which will allow to mitigate the economic and operational impact of the main problem, which is to reduce processes and reduce late attentions in the operation of public lighting. Finally, applying the improvements described can save up to 11.49% of the budget of the OAP area and be within the work standard according to Osinergmin. / Trabajo de Suficiencia Profesional
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Propuesta de mejora en el proceso de atención post venta en tiendas presenciales en Lima de una empresa de telecomunicaciones en el Perú para reducir los tiempos de atención mediante herramientas de Lean Service y estandarización de trabajo / Proposal to improve the post-sale service process in face-to-face stores in Lima of a telecommunications company in Peru to reduce service times through Lean Service tools and work standardizationPrieto Dueñas, Ingrid Katherine, Silva Huaycochea, Juvenal Aleksander 23 January 2022 (has links)
El presente trabajo de investigación, tuvo como objetivo plantear una propuesta de mejora en el proceso de atención post venta en tiendas presenciales en Lima de una empresa de telecomunicaciones en el Perú, aplicando herramientas de Lean Service y estandarización de trabajo. La empresa en estudio, presenta un nivel de satisfacción del cliente de 67% en promedio anual, mientras que el objetivo planteado debe ser mayor a 72%, la casa matriz tiene un nivel de 80%. El bajo porcentaje de satisfacción de los clientes se debe principalmente a dos motivos: Tiempo elevados que representa un 33% e Información errónea con un 30%, de los motivos de baja satisfacción. Ello implica una pérdida económica para la empresa de S/ 9,112,519 de soles en el periodo febrero 2019 – enero 2020, este impacto representa el 1,7% del ingreso bruto anual, considerando solo telefonía móvil en Lima del periodo en estudio. Ante la problemática presentada, se propone la implementación de herramientas de Lean Service como: Estandarización de trabajo y Poka Yoke, lo cual permitió reducir el tiempo en los procesos de mayor impacto para la compañía: en renovación se redujo un 22%, en reposición un 18% y en suspensión un 17%. Finalmente se concluye que el proyecto es viable debido al análisis realizado mediante los indicadores económico, obteniendo un VAN de S/ 200,650 y una TIR de 61%, además el índice de rentabilidad (IR) del proyecto es de 4.4, esto indica que por cada sol invertido se obtiene una ganancia de 3.4. / The objective of this research work was to propose a proposal for improvement in the post-sale service process in face-to-face stores in Lima of a telecommunications company in Peru, applying Lean Service tools and work standardization. The company under study has a customer satisfaction level of 67% on an annual average, while the objective set must be greater than 72%, the parent company has a level of 80%. The low percentage of customer satisfaction is mainly due to two reasons: High time, which represents 33% and Erroneous information with 30%, of the reasons for low satisfaction. This implies an economic loss for the company of S / 9,112,519 soles in the period February 2019 - January 2020, this impact represents 1.7% of the annual gross income, considering only mobile telephony in Lima for the period under study. Given the problem presented, the implementation of Lean Service tools such as: Work standardization and Poka Yoke is proposed, which allowed reducing the time in the processes of greatest impact for the company: in renovation it was reduced by 22%, in replacement a 18% and 17% in suspension. Finally, it is concluded that the project is viable due to the analysis carried out through the economic indicators, obtaining a NAN of S / 200,650 and an TIR of 61%, in addition, the profitability index (IR) of the project is 4.4, and this indicates that for each Invested sol, a profit of 3.4 soles is obtained. / Trabajo de Suficiencia Profesional
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Optimeringsmetod för produktionssystem med simulering och lean produktion / Optimization method for production systems with simulation and lean productionLevinsson, Samuel, Holgert, Douglas January 2023 (has links)
Genom rapporten kommer kunskapen öka kring identifiering och reducering av flaskhalsar baserade på simuleringsverktyget Facts Analyzer och lean-verktyg. Den ökade kunskapen kommer generera möjligheter för företag att arbeta på ett strukturerat och effektivt vis genom en egenutvecklad arbetsmodell. Modellen kommer ge förutsättningar för företag att öka sin produktivitet och samtidigt reducera totala kostnaderna. Metoderna som arbetsmodellen bygger på är kvantitativ, kvalitativ, abduktion och förverkligas genom tillämpning på ett fallföretag där syftet är att undersöka applicerbarheten och ifall produktionen kan effektiviseras. Med simuleringsverktyg skapas tydliga och fakta-baserade resultat på flaskhalsar och vad olika förbättringsalternativ har för påverkan på produktionen, därmed anses det vara ett bra verktyg att basera beslut på innan investeringar genomförs. Utifrån de identifierade flaskhalsarna, med hjälp av simuleringsverktyget, är det bevisat att lean-verktyg kan användas för att optimera produktion och reducera icke värdeskapande moment. Exempelvis visar resultatet att 5S, Kaizen, Poka Yoke, Total Productive Maintenance och Overall Equipment Efficiency är effektiva lean-verktyg. För att öka produktionskapaciteten handlar det om att först identifiera flaskhalsarna genom simuleringsverktyget. Därefter beräknas flaskhalsens OEE-värde som skapar indikationer om begränsningarna och därmed belyser vart förbättringsförslag behövs. Genom indikationerna tillsammans med ytterligare lean-verktyg skapas därefter förbättringsförslag med fokus på att reducera flaskhalsen. För att däremot identifiera totalkostnadsreducering och icke värdeskapande aktiviteter används istället observationer och intervjuer med personalen. Därefter utvecklas förbättringsförslag, liksom för produktionskapaciteten, genom lean-verktyg för att minimera Muda. / Through the report, knowledge will increase regarding the identification and reduction ofbottlenecks based on the simulation tool Facts Analyzer and lean-tools. The increasedknowledge will generate opportunities for companies to work in a structured and efficientway through a own developed work model. The model will provide the conditions forcompanies to increase their productivity and at the same time reduce total costs. The methodson which the work model is based are quantitative, qualitative, abduction and are realized through a case company where the aim is to investigate the applicability and if productioncan be made more efficient. With simulation tools, clear and fact-based results are created on the effect differentimprovement options have on production, and thus it is considered a good tool to basedecisions on before investments are made. Based on the identified bottlenecks, with the helpof the simulation tool, it is proven that lean-tools can be used to optimize production andreduce non-value-creating activities. For example, the results show that 5S, Kaizen, PokaYoke, Total Productive Maintenance and Overall Equipment Efficiency are effectivelean-tools. To increase production capacity, it is a matter of first identifying the bottlenecks through thesimulation tool. The bottleneck's OEE value is then calculated, which creates indications ofthe limitations and thus highlights where improvement proposals are needed. Through theindications together with additional lean-tools, improvement proposals are then created with afocus on reducing the bottleneck. In contrast, to identify total cost reduction andnon-value-creating activities, observations and interviews with the staff are used instead.Improvement proposals are then developed, as for the production capacity, through lean-toolsto minimize Muda.
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Battle for the Punchbowl: The U. S. 1st Marine Division 1951 Fall Offensive of the Korean WarMontandon, Joshua W. 08 1900 (has links)
This study is an operational and tactical study of a battle fought by the U. S. 1st Marine Division near "the Punchbowl," an extinct volcano of military value in the Taebaek Mountains of Korea, from late August through mid September 1951. That engagement was to be the last 1st Marine Division offensive of the Korean War. This battle, for Yoke and Kanmubong Ridges, has received little coverage from historians. That it is all but forgotten is surprising, since it was one of the hardest fought for United States Marines in the war. The casualties were high, and Americans did not understand why so many had to die for a war that seemed to already be set to conclude by negotiations. This study tells the story of that battle more completely than ever before, and assesses its significance to the course of the Korean War.
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O verdadeiro jejum: um estudo exegético de Is 58,1-12 / The genuine fast: an exegetical study of Is 58,1-12Lobo, Ronald 12 May 2011 (has links)
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Previous issue date: 2011-05-12 / The aim of the present study is to propose a reading of the book of Isaiah 58,1-12 which deals with a genuine fasting. The prophecy of Trito Isaiah, is intrinsically connected to justice and righteousness. As for the exegetical study the synchronic perspective is used. The study of literary aspect and historical context leads us to situate the perícope at the beginning of post-exilic period around 538-520 b.C. The exiled judean community returns to the homeland, and tries to reconstruct itself at the beginning of the Persian rule. In this context, the prophet s criticism tries to correct the religious practice, the fast as it is practiced, cut off of social solidarity with the fragile groups like those of hungry, naked and homeless. Through eight innovative forms of doing justice and righteousness the text proposes a new fast. Orders the end of all forms of oppression and on the counterpart proposes sharing of bread, clothing and boarding. The proposal goes ahead, asks for sharing of one s own life through a radical solidarity. For those who practice genuine fast, the LORD promises his continuous presence, the necessary protection and a happy future.
The dissertation is divided into four parts, all along, the commentary style prevails. The study wants to contribute, the understanding of fasting in present time, in the hopes and problems our society faces today / O presente estudo tem como meta propor uma leitura de Isaías Is 58,1-12 que fala de verdadeiro jejum. Na profecia de Trito Isaías, está intrinsecamente vinculada à prática da justiça e do direito. Quanto à metodologia exegética, a pesquisa é conduzida por meio da perspectiva sincrônica. O estudo literário e o contexto histórico da perícope levam-nos situá-lo no início do pós-exílio, por volta dos anos 538-520 a.C. A comunidade dos judeus exilados regressou à pátria sob o domínio persa e tenta reconstruir-se. Neste contexto, a denúncia profética tem por objetivo corrigir a prática religiosa, ou seja, o jejum praticado, no caso da perícope em questão, desassociada de uma prática social solidária com os grupos frágeis como famintos, nus e desabrigados. O texto propõe um novo jejum através dos oito modos inovadores de praticar a justiça e o direito. Pede-se o fim de toda forma de opressão e exige-se a partilha do pão, da veste e da moradia. A proposta segue adiante, pede-se a partilha da própria vida através duma solidariedade radical. Aos que seguem o novo jejum, o SENHOR promete-se a sua presença continua, proteção necessária e um futuro feliz.
O trabalho divide-se em quatro partes, prevalece o estilo de comentário. Este estudo quer contribuir com a atualização do sentido e da prática do jejum nos dias de hoje, a partir dos desafios e das esperanças de nossa sociedade
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Reducera hittills ovärderad process genom Lean ThinkingTalcoth, Stephan, Nilsson, Jenny January 2015 (has links)
No description available.
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Využití vybraných logistický metod ve výrobním podniku / The usage of selected logistic methods in the manufacturing concernKOHOUTOVÁ, Anna January 2008 (has links)
The main aim of this work was to rate the usage of selected logistic methods and introduction of the operating system Kanban to the production line in the project {\clqq}C214 Top Roll`` of the company Faurecia Automotive Czech Republic, s.r.o, Interior Systems. A minor aim then was to find out the knowledge level of the Kanban method. Methodics Hypotheses: 1.The logistic flows used in the Faurecia company already function sufficiently enough, the proof of which is the stabilised production. 2.Using the operating system Kanban for functioning production, logistics and the whole company Faurecia is rather advantageous. 3.Training all the employees is a vital part in the process of introducing the operating system Kamban. Methods: deducion, situation analysis - collection of information,interviews, survey, questioning brief, modeling Structure of the practical part is following: company profile, character of pruduction and setting of the main logistical flows, determination of zones and stock sectors, process implementation and using of Kanban in the production line "C214 Top Roll". The first hypothesis can be confirmed by the situational analysis which evaluates the processing and logistic method. The individual methods {\clqq}met`` or {\clqq}nearly met`` the demands and because all the methods together partake of the production and the production has provided very good results in the previous months, we can consider the production being stabilised. The second can also be affirmed. If the production on a particular assembly line is stabilised, it is possible to introduce the Kanban method. Why not to use it if a there is a great advantage of this method in simplicity and lower production supplies which result in decreasing the total costs? It is beneficial for all participating on the production and for the Faurecia company as a whole. Third hypothesis can be confirmed as well. There has been a survey based on short questionaires and the knowledge of working and using the Kanban has been found inadequate. The best form of providing all the important information will be a training as a part of the process of introducing and using the Kanban method. Both aims have been resulted in stating possible recommendations and improvement suggestions: - production is stabilized, Kanban is possible to apply on 1.9. 2008 - training is necessary, meeting of responsible persons, control, messing, measures, - training of current and new workers, - motivation, communication improve, - system of regural records about information and control of chief (material and production planning)
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A CONTINOUS ROTARY ACTUATION MECHANISM FOR A POWERED HIP EXOSKELETONRyder, Matthew C 17 July 2015 (has links)
This thesis presents a new mechanical design for an exoskeleton actuator to power the sagittal plane motion in the human hip. The device uses a DC motor to drive a Scotch yoke mechanism and series elasticity to take advantage of the cyclic nature of human gait and to reduce the maximum power and control requirements of the exoskeleton. The Scotch yoke actuator creates a position-dependent transmission that varies between 4:1 and infinity, with the peak transmission ratio aligned to the peak torque periods of the human gait cycle. Simulation results show that both the peak and average motor torque can be reduced using this mechanism, potentially allowing a less powerful motor to be used. Furthermore, the motor never needs to reverse direction even when the hip joint does. Preliminary testing shows the exoskeleton can provide an assistive torque and is capable of accurate position tracking at speeds covering the range of human walking. This thesis provides a detailed analysis of how the dynamic nature of human walking can be leveraged, how the hip actuator was designed, and shows how the exoskeleton performed during preliminary human trials.
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Návrh zavedení štíhlé výroby v průmyslovém podniku / The proposal of lean production implementation in a industrial enterpriseKalouda, Petr January 2009 (has links)
Tendency of this diploma thesis is to find cost of economies through the device of lean production. On the basis of more than fourmonth monitoring and classification was specificated the problem, which is solved by implementation devices of lean production. Thanks these devices would be cut the bussines costs and salary and helps to do One piece flow too.
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