L’originalité de notre travail consiste à développer une approche qui intègre l’ingénierie systèmes basée sur les modèles (MBSE) avec les principes de l’approche SBCE afin de réduire les boucles itératives entre les concepteurs inexpérimentés, les fabricants et les experts. D’autres parties prenantes participent également au développement du produit afin d’assurer environnement d’ingénierie simultanée. Cette approche offre un grand potentiel pour gérer les aspects de fabricabilité et de fiabilité, en raison de la capacité à développer des connaissances en parallèle, en particulier pour les technologies avancées et non matures. L’avantage d’utilisation des principes du SBCE est d’offrir des possibilités de communication entre les parties prenantes au début de la phase de conception. SysML est utilisé comme langage descriptif pour représenter les différentes phases de cette approche. Pour étudier la robustesse ces système, nous avons développé un modèle intitulé «Model Based for Robustness Analysis» (MBRA) qui a pour objectif de filtrer les solutions faibles ou coûteuses au fil du temps et d’assister l’ingénieur système lors de l'adoption d’une étude de compromis. Pour l’étude de la fabricabilité des systèmes complexes, nous avons développé un autre modèle intitulé « Model Based for Manufacturability analysis » / The originality of our work is to develop an approach that integrates model-based systems engineering (MBSE) with the principles of the SBCE approach to reduce iterative loops between inexperienced designers, manufacturers, and experts. Other stakeholders are also involved in product development to ensure simultaneous engineering environment. This approach offers great potential for managing manufacturability and reliability aspects, due to the ability to develop parallel knowledge, especially for advanced and non-mature technologies. The advantage of using SBCE principles is to provide opportunities for communication between stakeholders early in the design phase. SysML is used as a descriptive language to represent the different phases of this approach. To study the robustness of these systems, we have developed a model called "Model Based for Robustness Analysis" (MBRA) which aims to filter low or expensive solutions over time and to assist the system engineer when adopting a trade-offs study. For the assessment of the manufacturability of complex systems, we have developed another model entitled "Model Based for Manufacturability analysis"

Oftast har produktutveckling samma generella tillvägagångssätt: En specifikation för en ny produkt lämnas från en marknadsföringsavdelning till en produktutvecklingsavdelning. Produktutvecklare tar sedan fram koncept som utvecklas till prototyper för att sedan tillverkas och säljas. Tillvägagångssättet skiljer sig vanligtvis genom att olika modeller som exempelvis Lean product development eller integrerad produktutveckling används i processen. Delen av Lean product development (LPD) som används vid konceptutveckling kallas set based concurrent engineering (SBCE) och dessa begrepp är relativt nya i Sverige. Vad krävs för att arbeta med set based concurrent engineering på ett framgångsrikt sätt? Går det att identifiera viktiga faktorer vid produktutveckling med SBCE hos företag? En litteraturstudie som resulterade i en lista med fem potentiellt viktiga faktorer vid produktutveckling med SBCE gjordes inför en kvalitativ studie av fem företag. Semistrukturerade intervjuer utfördes på Husqvarna, Saab, Furhoffs, Ericsson Radio och GKN Aerospace för att samla in empiri inför analys. I analysen jämfördes företagens sätt att produktutveckla med listan som togs fram i litteraturstudien. Slutsats av studien var att några viktiga faktorer för att lyckas med produktutveckling enligt SBCE är: Bred lösningsrymd, Kunskapsbaserat bortval av koncept, Återvinning av kunskap, Tekniskt kunnig projektledning, Tvärfunktionella arbetsgrupper. Dessutom framkom att en investering i rätt ledarskap kan vara en viktig faktor vid implementering av SBCE då företagets ledning måste ha förståelse för arbetsmodellen om SBCE ska kunna resultera i en positiv effekt. / Product development usually has the same general approach: A specification for a new product is provided to the product development department from the marketing department. Product developers then generate concepts which are developed into prototypes before the products are manufactured and sold. The procedure usually differs by the use of different models such as Lean product development or integrated product development in the process. The part of Lean product development (LPD) that is used when developing concepts is called set based concurrent engineering (SBCE) and these are new concepts in Sweden. What is required to work with set based concurrent engineering in a successful manner? Is it possible to identify important factors when developing products using SBCE in companies? A literature study which resulted in a list with five potentially important factors when developing products using SBCE was created before a qualitative study was conducted at five companies. Semi structured interviews were conducted at Husqvarna, Saab, Furhoffs, Ericsson Radio and GKN Aerospace to gather data for an analysis. In the analysis, comparisons were made between the companies’ way of developing products with the list that was created in the end of the literature study. A conclusion of the study was a number of important factors when developing products using SBCE could be: Wide solution space, Knowledge based screening of concepts, Recycling of knowledge, Technically competent project management, Cross functional teams. The study also showed that an investment in the right type of leadership could potentially be an important factor when implementing SBCE since the company management need to understand the working model if SBCE is going to have a positive effect.

Made available in DSpace on 2016-06-02T19:50:22Z (GMT). No. of bitstreams: 1 5704.pdf: 1773498 bytes, checksum: 85fec41b7847eb2dbec77d70790eb636 (MD5) Previous issue date: 2013-12-10 / Universidade Federal de Sao Carlos / Given the movement of national and international competitions, the fast technological advances, the reduction in life cycle of products on the market and greater demands for quality and services associated with products, product development has established itself as one of the business processes key to the growth and survival of businesses of various industrial sectors and has, over the years, becoming a powerful source of competitiveness for companies from various sectors. Toyota has developed and uses a product development model considered extremely competitive, which helped make it the largest automobile manufacturer in the world. This model is called Lean Development and is a worldwide reference. The model uses lean concepts, derived from Lean Thinking, in the product development process. Studies in international scope are being conducted in order to characterize, evaluate and apply this model in other companies, either automotive market or others different markets. This Thesis presents the results obtained by a survey carried out in manufacturing companies located at Brazil. The population was defined like innovative companies with product development area in the investigated site and with Lean Manufacturing applied for at leats five years. It is presented a descriptive analysis of the companies analyzed and a factorial analysis, which reduces the research variables in four contextual factors of Lean Development. A cluster analysis of the factors identified by the factorial analysis was performed and four groups of companies were founded. The groups were classified in relation to the product development process, according to literature. The results show that 38.2% of surveyed sample applies lean concepts (principles and tools) in both production system and product development process and approximately a half of surveyed sample (46.9%) applies only lean principles in production system, but does not migrate these principles to product development process. However, these last companies are the ones with the best results in product development. / Diante dos movimentos das concorrências nacional e internacional, dos rápidos avanços tecnológicos, da diminuição do ciclo de vida dos produtos no mercado e das maiores exigências quanto à qualidade e aos serviços associados aos produtos, o desenvolvimento de produto se consolidou como um dos processos de negócio chave para o crescimento e a sobrevivência das empresas de diversos setores industriais e vem, ao longo dos anos, se transformando em uma poderosa fonte de competitividade para as empresas de diversos setores. A Toyota desenvolveu e utiliza um modelo de desenvolvimento de produto considerado extremamente competitivo, que ajudou a transformá-la na maior montadora automobilística do mundo. Esse modelo, considerado uma referência mundial, é chamado de Lean Development e utiliza conceitos enxutos, derivados do Lean Thinking, no processo de desenvolvimento de produtos. Estudos estão sendo realizados, em âmbito internacional, a fim de caracterizar, avaliar e aplicar esse modelo em outras empresas, tanto do mercado automobilístico quanto em outros diferentes mercados. Esta Tese apresenta os resultados obtidos por meio de um uma pesquisa de campo tipo survey, realizado em empresas industriais situadas no Brasil. A população foi delimitada em empresas inovadoras, que possuem a área de desenvolvimento de produto na planta pesquisada e, ainda, o Lean Manufacturing implantado há pelo menos cinco anos. É apresentada uma análise descritiva das empresas analisadas e uma análise fatorial, a qual reduz as variáveis de pesquisa em quatro fatores contextuais do Lean Development. Uma análise de agrupamento entre os fatores identificados pela análise fatorial foi realizada, originando quatro agrupamentos de empresas, os quais foram classificados em relação ao processo de desenvolvimento de produto, de acordo com a literatura. Os resultados mostram que 38,2% da amostra pesquisada aplica os conceitos enxutos (princípios e ferramentas) da manufatura no processo de desenvolvimento de produto e aproximadamente metade da amostra pesquisada (46,9%) aplica somente os princípios enxutos na manufatura, mas não os migra para o processo de desenvolvimento de produto. No entanto, essas últimas são as que apresentam os melhores resultados em desenvolvimento de produto.