Há vários anos, o adequado entendimento sobre o funcionamento do Sistema Toyota de Produção (STP) vem desafiando as comunidades científica e empresarial. O crescente desempenho competitivo, galgado com base na aplicação continuada do paradigma da produção enxuta nas suas operações, vem sendo atestado pelos extraordinários resultados obtidos pela montadora japonesa. Como conseqüência, os tradicionais líderes da indústria automobilística como a GM, Ford e Chrysler vêm cedendo, paulatinamente, os seus lugares no ranking dos maiores produtores mundiais, à Toyota. A despeito de todos os esforços por parte da maioria das empresas industriais, em especial, das grandes montadoras, em tentar replicar o referido sistema de produção, freqüentes têm sido os insucessos. Tais processos têm se caracterizado, com poucas exceções, pela ausência de uma abordagem de longo prazo na condução da implementação e pela carência de compreensão sobre os conceitos e princípios que regem e embasam o STP. Com isso, se multiplicam as cópias de técnicas e ferramentas enxutas nas mais variadas realidades industriais, as quais são geralmente aplicadas com o objetivo de auferir resultados imediatos. Essas aplicações são feitas sem o necessário entendimento sistêmico sobre a função que cada ferramenta deve executar dentro do sistema de produção como um todo. Dentro deste contexto, as lideranças não têm mostrado suficiente compreensão sobre o aprendizado subjacente que caracteriza esses processos de mudança. Com o intuito de contribuir com a discussão científico-prática que busca encontrar soluções para esses problemas, esta tese propõe um Modelo de Guia que organiza as fases iniciais do processo de implementação da Produção Enxuta (Decisão de adoção e Preparação para a implementação). Esse Guia se baseia na valorização e na priorização do entendimento do funcionamento sistêmico do STP (princípios e capacitadores práticos que os operacionalizam sistemicamente), destacando a preparação da liderança no papel de agente de mudança dentro dos processos de transformação enxuta. Em cada fase prevista neste modelo, são detalhados os passos que reforçam o aprendizado organizacional imprescindível ao processo de transformação, os quais promovem o adequado enfrentamento aos desafios que naturalmente tendem a bloquear esse tipo de empreendimento. / For several years, an accurate understanding about the running of Toyota Production System (TPS) has been challenging both scientific and business communities. The rising competitive performance based on the continuous application of the lean manufacturing paradigm in their operations, has led Toyota to achieve outstanding results. Consequently, traditional automobilistic industry leaders such as GM, Ford and Chrysler have been gradually losing their ranking places as worldwide greatest manufacturers to the japanese car company. Despite all efforts made by most industrial corporations, the attempt to replicate the referred production system has been unsuccessful. Such processes are charaterized, with few exemptions, by the absence of a long term approach on the implementation management, in addition to the lack of a comprehension of concepts and principles that rule and underpin the TPS. Therefore, copies of lean techniques and tools in the most varied industrial realities are being multiplied and generally implemented in order to obtain immediate results. Such procedures are made without the proper systemic understanding on the role played by each tool in the production system as a whole. Within this context, the leaders have proven frequently an unaccurate understanding about the subjacent learning which characterizes these processes of change. Aiming to contribute with a practical-scientific discussion, which manages to find solutions to the afore mentioned problems, this thesis proposes a Guide Model that organizes the initial phases of the Lean Manufacturing implementation process (Decision of adoption and Preparation of implementation). This guide focuses on the valorization and on the prioritization of the TPS´s systemic running comprehension (principles and the practical tools that systemically operationalize them), highlighting the preparation of the leadership on the role of agent of change within the lean transformation processes. At each stage presented in this model, are detailed the steps which reinforce the organizational learning essential to the transformation process, which promote the appropriate coping with the challenges that naturally tend to block this type of enterprise.

La presente investigación abunda en los conceptos relacionados a los retrasos que ocurren en una obra y a las causas del ineficiente seguimiento y control realizado al cronograma contractual de proyectos de construcción de la ciudad de Lima Metropolitana. Asimismo, se recaudó información de metodologías y herramientas a la vanguardia y se levantó la información de 3 proyectos de construcción de edificaciones multifamiliares. A partir de la información de estos proyectos, se identificaron los principales problemas de cada metodología que terminaron causando retrasos sobre los plazos contractuales de los mismos. Estos problemas pudieron ser agrupados en tres principalmente: la inadecuada planificación, la inadecuada programación y el vínculo débil o inexistente entre ambos. A partir de lo mencionado, se propuso una metodología con el principal objetivo de brindar una guía hacia los contratistas para realizar un seguimiento efectivo al plazo contractual de sus proyectos y prevenir todo retraso. / This investigation reviews the concepts related to the delays that occur in construction projects and the causes of the inefficient monitoring and control made to the contractual schedule in multi-family building projects developed in the city of Lima, Peru. Information was collected on methodologies and tools being used worldwide as well as from 3 multi-family constriction building projects. From the information of these projects, the main problems of each methodology that ended up causing delays over their contractual schedule were identified. Problems identified were grouped into three: inadequate planning, inadequate programming and a weak or non-existent link between the two. Based on this analysis, a methodology was proposed with the main purpose of providing a guide to contractors to effectively monitor the contractual schedule of their projects and prevent any delay. / Tesis

Syfte: Syftet är att skapa förståelse för den påverkan som implementering av lean har på arbetsmiljön ur ett medarbetarperspektiv. Metod: Studien genomförs som en kvalitativ fallstudie enligt hermeneutiskt tolkningsperspektiv där primärdata samlas in genom semistrukturerade intervjuer. Sekundärdata har huvudsakligen samlats in genom vetenskapliga artiklar och litteratur på området. Resultat & slutsats: Studien visar att implementering av lean påverkar medarbetarnas arbetsmiljö och att faktorer som delaktighet, kommunikation, utbildning och inte minst ledarskapet är viktiga faktorer för en god arbetsmiljö. En initial motvilja har efterhand som konceptet inarbetats bytts ut mot en positiv inställning och ett nytt sätt att arbeta. Examensarbetets bidrag: Studien bidrar till att skapa förståelse för hur implementering av lean påverkar arbetsmiljön. Genom förståelse för hur externa strukturer påverkar interna strukturer och därigenom medarbetarnas agerande vill vi belysa vilka faktorer som företag bör rikta fokus mot för att bibehålla en god arbetsmiljö under implementering av lean. Studiens resultat kan inte direkt generaliseras till andra arbetsplatser, men erbjuder en möjlighet att testa samma metod för att se hur arbetsmiljön påverkas. Förslag till fortsatt forskning: Studien är relativt liten och medarbetarna har arbetat tillsammans under lång tid, därför kan framtida studier med fördel utföras på företag med större personalomsättning, annat företag i servicebranschen eller som en jämförande studie mellan två olika företag för att se påverkan på arbetsmiljön. / Aim: The aim of the study is to create understanding of the implications of lean implementation on the work environment seen from the coworker perspective Method: Qualitative case study with primary data collected by interviews of managers and employees at ICA Maxi Special in two different cities. Secondary data was collected from scientific articles and relevant literature regarding previous research in the field. Result & Conclusions: The study reveals that implementation of lean affects the coworkers' perceived work environment and that factors such as participation, meaningfulness, autonomy, communication and education are important factors for a good work environment. The initial reluctance experienced by coworkers when implementing the concept was later exchanged for a positive attitude and a new way of work, which consequently led to a better working environment in general. Contribution of the thesis: The findings of this study contribute to research by understanding and highlighting the factors that influence the employees work environment. By understanding the effect of external structures, such as lean and how it affects internal structures, and such as the actions and reactions of coworkers, companies can mitigate the impact on the work environment when implementing lean. Suggestions for future research: The study is rather small and conducted at a workplace where most of the employees have worked together for several years. Therefore, we suggest that future studies can be conducted at companies with a larger employee turnover, or at a different type of company in the service industry, or as a comparative study between

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