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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Análise das variáveis contingenciais nas adaptações das práticas de produção enxuta na implementação de sistemas de produção específicos (XPS)

Medeiros , Nayara Cardoso de 17 August 2016 (has links)
Submitted by Leonardo Cavalcante (leo.ocavalcante@gmail.com) on 2018-06-05T15:34:46Z No. of bitstreams: 1 Arquivototal.pdf: 1835964 bytes, checksum: 16c49455a49433521718fd2d6d19319b (MD5) / Made available in DSpace on 2018-06-05T15:34:46Z (GMT). No. of bitstreams: 1 Arquivototal.pdf: 1835964 bytes, checksum: 16c49455a49433521718fd2d6d19319b (MD5) Previous issue date: 2016-08-17 / Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPq / Facing the need for adaptations of lean production to the characteristics of each organization, researchers have questioned the universality of this production system. These adjustments may be related to the contextual characteristics of the manufacturing system of each organization and can lead to the development of company-specific production systems, or simply XPSs. Thus, the aim of this research is to analyze how the contingency variables of a manufacturing system influence the adaptations of lean production practices for the implementation of an XPS. The research was developed through case studies conducted in two manufacturing plants, one of the electronics industry and other from the home appliances sector, both located in the city of Manaus/AM. The data were collected mainly through semi-structured interviews and on-site observation. Through this research, adaptations have been identified, not in the lean practices but in the manufacturing system of the companies, i.e., instead of the contingency variables demand adaptations to the formation of a company-specific production system, the Toyota system (universal approach) remains as the main driver of change in their own manufacturing system variables. Based on this observation, two potential outcomes can be inferred: either the influences of contingency variables may be irrelevant or they are not perceived by managers. Finally, in neither of the cases studied was identified the creation of specific practices tailored to the company. On the contrary, it was found the use of the same traditional practices of TPS. On the other hand, it was clearly observed the intention of creating an identity for the XPS, much more as a motivational factor than as a true adaptation. This evidence allowed the development of three propositions that deserve further research. / Diante da necessidade de adaptações da produção enxuta às características de cada organização, pesquisadores têm questionado sobre a universalidade desse sistema de produção. Essas adaptações podem estar relacionadas às características contextuais do sistema produtivo de cada organização e que podem levar ao desenvolvimento de sistemas de produção específicos, ou simplesmente XPS’s. Dessa forma, o principal objetivo dessa pesquisa é analisar como as variáveis contingenciais dos sistemas de produção influenciam nas adaptações das práticas de produção enxuta para a implementação de um XPS. A pesquisa foi desenvolvida por meio de estudos de caso conduzidos em duas fábricas, sendo uma do setor de eletroeletrônico e outra do setor de eletrodomésticos, ambas localizadas no município de Manaus/AM. Os principais instrumentos de coleta de dados adotados foram entrevistas semiestruturadas e observação in loco. Por meio da pesquisa, foram identificadas adaptações, mas não nas práticas e sim no próprio sistema produtivo das empresas, ou seja, ao invés das variáveis contingenciais demandarem adaptações para a formação de um sistema de produção específico, o sistema Toyota (abordagem universal) permanece como o guia principal da mudança nas próprias variáveis que representariam as contingências da adaptação. Diante dessa constatação, surgiram dois potenciais desdobramentos: ou as influências das variáveis contingenciais podem ser irrelevantes ou não são percebidas pelos gerentes. Por fim, em nenhum dos dois casos estudados foi identificado o desenvolvimento de práticas específicas para a empresa. Pelo contrário, o que se constatou foi a utilização das mesmas práticas tradicionais do TPS. Por outro lado, foi observada claramente a intenção da criação de uma identidade para o XPS da empresa, mais como um fator motivacional do que por uma real adaptação. Tais evidências permitiram o desenvolvimento de três proposições que merecem um aprofundamento em pesquisas futuras.
2

Value-adding deployment of corporate lean programs in multinational production companies

Linderson, Sara January 2022 (has links)
Strategic improvement programs, which aim for corporate-wide lean transformation, are resource-demanding and challenging to deploy. Industrial manufacturers often develop company-specific production system (XPS) programs to coordinate the lean transformation simultaneously in multiple production sites. However, transferring lean-related knowledge in a multi-site context is complex as it is associated with tacit knowledge embedded in people.  This thesis aims to contribute with knowledge of how multinational corporations (MNCs) can develop their deployment strategies to add more value in the business by investigating i) what constitutes deployment of an XPS program and ii) how an XPS program promotes the transfer of lean-related knowledge. The qualitative research conducted was based on three empirical case studies, which all applied an intra-firm perspective within an MNC.  Regarding the deployment challenges, it was found to be poorly described in the literature. This thesis explores and describes the deployment of XPS programs based on empirical findings and scholarly literature. Applying program management theory and a knowledge transfer perspective contributed to holistically understanding XPS programs' deployment. It was observed that four deployment variables are the most important. These deployment variables constitute the content of an XPS (conceptual models and a toolbox of improvement tools) and implementation support (implementation structure and control practices). XPS programs are often assumed to facilitate the transfer of lean-related knowledge. This thesis expands the discourse to show how an XPS program may promote and hinder knowledge transfer in three different perspectives; when implementing larger improvement projects, rolling out global lean method standards, and incorporating new lean methods bottom-up. This research contributes to theory by describing the deployment of an XPS program in depth. A deployment model was developed that stipulates the deployment variables and their interconnection. Some of the findings may have practical applications for industrial practitioners when developing and evaluating the deployment strategies within their XPS program. / Strategiska förbättringsprogram som strävar efter en bred lean transformation inom företaget är resurskrävande och utmanande att rulla ut. Industriella tillverkare utvecklar ofta program för företagsspecifika produktionssystem (XPS) för att koordinera lean transformationen på flertal produktionsanläggningar parallellt. Lean kunskap förknippas med tyst kunskap, inneboende i människor, vilken är mer komplex att överföra i en kontext med multipla produktionsanläggning sprida över världen. Denna avhandling har som mål att bidra med kunskap om hur multinationella företag (MNC) kan utveckla sina utrullningsstrategier så att de tillför mer värde till verksamheten genom att undersöka i) vad utgör utrullning av ett XPS-program och ii) hur ett XPS-program främjar överföring av leanrelaterad kunskap. Den kvalitativa forskningen som genomfördes baserades på tre empiriska fallstudier, som alla tillämpade ett internt perspektiv inom det multinationella företaget (MNC) som studerades. Utmaningarna med utrullningar visade sig det vara dåligt beskrivet i litteraturen. Av den anledningen har denna avhandling utforskat och beskrivit utrullning av XPS-program baserat på empiriska fallstudierna och vetenskaplig litteratur. I arbetet har programledningsteori och ett kunskapsöverföringsperspektiv tillämpats, vilket bidrog till en holistisk förståelse av XPS-programs utrullning. Studien identifierade fyra viktiga variabler för utrullning som utgör både innehållet i en XPS (konceptuella modeller och en verktygslåda med förbättringsverktyg) och ett implementeringsstöd (implementeringsstruktur och kontroll-handlingar). I tidigare publikationer antas ofta att XPS-program underlättar överföringen av lean-relaterad kunskap. Denna avhandling utökar det resonemanget genom att visa hur ett XPS-program kan dels främja, men även hindra kunskapsöverföring utifrån tre olika perspektiv; när man implementerar större förbättringsprojekt, rullar ut globala standarder för lean-metoder och vid inkorporering av nya lean-metoder där produktionsanläggningen är källan till kunskapen. Denna forskning bidrar till teorin genom att på djupet beskriva utrullningen av ett XPS-program. En utrullningsmodell utvecklades för att beskriva utrullningsvariablerna och deras sammankoppling. Vissa av resultaten kan även ha praktiska tillämpningar för verksamma inom industrin när de utvecklar och utvärderar strategierna inom deras XPS-program.
3

Operational performance driven production system design process

Islam, Md Hasibul January 2022 (has links)
The design process of a production system referred to as the production system design process (PSDP) impacts on the operational performancethroughout the lifecycle of the production system, especially on the rampupand operation phases. Despite the impact of activities of PSDP on the operational performance, how to manage the PSDP is still a challenge for manufacturing companies. Earlier research urged to develop a systematic PSDP concerning its impact on the operational performance. This thesis aims to contribute with knowledge of how manufacturingcompanies can manage the PSDP by investigating 1) the enablers in thePSDP that impact on operational performance in ramp-up and operation phases, and 2) how the lean production concept could be adopted tomanage the activities during the PSDP. A case study was conducted in aprocess type manufacturing company, where empirical data were collectedfrom three new production line launching projects by qualitative means. This thesis identifies a set of enablers in the PSDP that potentiallyimpact the operational performance after launching the productionsystem. Empirical findings demonstrate that ensuring proper actions onthe identified enablers in the PSDP could lead to higher operationalperformance of the designed production system. These enablers rangefrom the company´s internal boundary to external vendors, requiring asystematic way to manage these diverse aspects. Adopting the lean production concept in the PSDP context, this thesis proposes a model of Lean Production System Design Process, containing 13 principles andrelevant practices. The proposed model of lean PSDP could be used as a systematic processto manage the activities in the PSDP that would ensure proper actions related to the identified enablers. Empirical findings indicate that adoptionof lean in the PSDP could result in reducing lead time of launching a new production system, and achieving fast ramp-up and desired operational performance considering sustainability aspects. Finally, this thesis demonstrates how the lean PSDP could be a means to achieve a sustainable competitive advantage based on the resource based view theoretical perspective. / Utformningsprocessen av ett produktionssystem, i denna avhandlingkallad produktionssystemets utformningsprocess (PSUP), påverkar denoperativa prestandan under hela produktionssystemets livscykel, särskilt iupprampnings- och driftsfasen. Traditionellt sett ligger fokus underutformningsprocessen på att lansera det nya produktionssystemet vidplanerad tidpunkt och enligt budget. Trots att de aktiviteter somgenomförs i utformningsprocessen påverkar den operativa prestandan idriftsfasen, ägnas ofta mindre uppmärksamhet åt designfasen än vad somvore önskvärt. Tidigare forskning har argumenterat för att utveckla ensystematisk designprocess för framtagning av produktionssystem medsyfte att nå en positiv påverkan på den operativa prestandan. Forskningen i denna avhandling bidrar till att öka kunskapen om hurPSUP kan hanteras och förbättras genom att identifiera: 1) möjliggörare i PSUP som påverkar den operativa prestandan i upprampnings- ochdriftfasen, och 2) hur lean konceptet skulle kunna användas för att hanteraaktiviteterna under PSUP. Resultatet är identifieringen av ett antal faktorer/möjliggörare iproduktionssystemets utformningsprocess (PSUP) som potentiellt kanpåverka den operativa prestandan efter lansering av produktionssystemetoch produktionsstart. Dessa möjliggörare handlar om alltifrån frånföretagets interna gränser till externa leverantörer och kräver ensystematisk procedur för att dra nytta av faktorernas potential. Genom attanvända lean även i PSUP-sammanhanget, föreslås här konceptet Lean PSUP (produktionssystemsutformningsprocess), som innehåller 13 principer och relevanta praxis. Den föreslagna modellen för lean PSUP skulle kunna användas och gestruktur till hanteringen av aktiviteterna i utformningsprocessen.Forskningen indikerar att lean inte bara kan användas i driftsfasen utanäven i utformningen av ett produktionssystem, vilket skulle kunnaresultera i bättre integration mellan olika funktioner, minska ledtiden förutformning och lansering av ett nytt produktionssystem, och uppnå snabbupprampning och önskad operativ prestanda, både avseende produktionoch hållbarhet. Slutligen visar denna avhandling hur lean PSUP kan varaett sätt att uppnå konkurrensfördelar ur ett resursbaserat teoretiskt perspektiv.

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