Reliability is one of the most critical performance measures of guided missile systems. It is directly related to missile mission success. In order to have a high reliability value, reliability analysis should be carried out at all phases of the system design. Carrying out reliability analysis at all the phases of system design helps the designer to make reliability related design decisions in time and update the system design. In this study, reliability analysis process performed during the conceptual design phase of a Medium Range Anti-Tank Missile System Inertial Measurement Unit (IMU) was introduced. From the reliability requirement desired for the system, an expected IMU reliability value was derived by using reliability allocation methods. Then, reliability prediction for the IMU was calculated by using Relex Software. After that, allocated and predicted reliability values of the IMU were compared. It was seen that the predicted reliability value of the IMU did not meet the required reliability value. Therefore, reliability improvement analysis was carried out.

Esta dissertação apresenta a importância do gerenciamento da confiabilidade de um produto durante seu desenvolvimento. Tal gerenciamento consiste em um processo sistemático que resulta no alcance dos requisitos governamentais, do cliente e da empresa. Estudou-se a metodologia de gerenciamento da confiabilidade através do planejamento da confiabilidade meta, alocação ótima de confiabilidade, avaliação e modelagem da confiabilidade, planejamento do crescimento da confiabilidade, controle do crescimento da confiabilidade até a obtenção dos resultados planejados. Através dessa metodologia, em um estudo aplicado contemplando um produto médico-hospitalar, foi possível: (a) identificar os componentes críticos do produto, (b) identificar a lacuna existente entre o valor de confiabilidade no início do projeto quando comparado à meta, (c) planejar o crescimento da confiabilidade ao longo das fases do projeto, (d) realizar melhorias ou reprojetos nos componentes do produto, (e) controlar o crescimento da confiabilidade e (f) alcançar a confiabilidade planejada. Os resultados obtidos foram de um aumento de 24% para 100% na confiabilidade do produto para cinco anos de utilização e de 0% para 83% para dez anos de utilização. Os valores obtidos de confiabilidade superaram os valores planejados, confirmando a eficiência da metodologia adotada. / This study discusses the relevance of Product Reliability Management during the product development phase. It consists of a systematic process that results in achieving the requirements of government regulations, customer satisfaction and companies goals. We studied the Product Reliability Management methodology through five aspects, including: target planning, optimal allocation, evaluation and modeling of product reliability, growth planning, and growth control to achieve the planned results. Using this methodology, applied in a study comprising the analysis of a medical product, it was possible to: (a) identify the critical components of the product (b) identify the gap between the reliability rate at the beginning of the project when compared to the final target (c) plan the growth of reliability throughout the phases of the project (d) make improvements or redesign product components (e) control the growth of reliability and (f) achieve the planned product reliability. The obtained results show an increase of 24% to 100% on five years product reliability, and from 0% to 83% for ten years product reliability. The values of reliability exceeded the planned values, confirming the effectiveness of the Product Reliability Management methodology.

Esta dissertação apresenta a importância do gerenciamento da confiabilidade de um produto durante seu desenvolvimento. Tal gerenciamento consiste em um processo sistemático que resulta no alcance dos requisitos governamentais, do cliente e da empresa. Estudou-se a metodologia de gerenciamento da confiabilidade através do planejamento da confiabilidade meta, alocação ótima de confiabilidade, avaliação e modelagem da confiabilidade, planejamento do crescimento da confiabilidade, controle do crescimento da confiabilidade até a obtenção dos resultados planejados. Através dessa metodologia, em um estudo aplicado contemplando um produto médico-hospitalar, foi possível: (a) identificar os componentes críticos do produto, (b) identificar a lacuna existente entre o valor de confiabilidade no início do projeto quando comparado à meta, (c) planejar o crescimento da confiabilidade ao longo das fases do projeto, (d) realizar melhorias ou reprojetos nos componentes do produto, (e) controlar o crescimento da confiabilidade e (f) alcançar a confiabilidade planejada. Os resultados obtidos foram de um aumento de 24% para 100% na confiabilidade do produto para cinco anos de utilização e de 0% para 83% para dez anos de utilização. Os valores obtidos de confiabilidade superaram os valores planejados, confirmando a eficiência da metodologia adotada. / This study discusses the relevance of Product Reliability Management during the product development phase. It consists of a systematic process that results in achieving the requirements of government regulations, customer satisfaction and companies goals. We studied the Product Reliability Management methodology through five aspects, including: target planning, optimal allocation, evaluation and modeling of product reliability, growth planning, and growth control to achieve the planned results. Using this methodology, applied in a study comprising the analysis of a medical product, it was possible to: (a) identify the critical components of the product (b) identify the gap between the reliability rate at the beginning of the project when compared to the final target (c) plan the growth of reliability throughout the phases of the project (d) make improvements or redesign product components (e) control the growth of reliability and (f) achieve the planned product reliability. The obtained results show an increase of 24% to 100% on five years product reliability, and from 0% to 83% for ten years product reliability. The values of reliability exceeded the planned values, confirming the effectiveness of the Product Reliability Management methodology.

Esta dissertação apresenta a importância do gerenciamento da confiabilidade de um produto durante seu desenvolvimento. Tal gerenciamento consiste em um processo sistemático que resulta no alcance dos requisitos governamentais, do cliente e da empresa. Estudou-se a metodologia de gerenciamento da confiabilidade através do planejamento da confiabilidade meta, alocação ótima de confiabilidade, avaliação e modelagem da confiabilidade, planejamento do crescimento da confiabilidade, controle do crescimento da confiabilidade até a obtenção dos resultados planejados. Através dessa metodologia, em um estudo aplicado contemplando um produto médico-hospitalar, foi possível: (a) identificar os componentes críticos do produto, (b) identificar a lacuna existente entre o valor de confiabilidade no início do projeto quando comparado à meta, (c) planejar o crescimento da confiabilidade ao longo das fases do projeto, (d) realizar melhorias ou reprojetos nos componentes do produto, (e) controlar o crescimento da confiabilidade e (f) alcançar a confiabilidade planejada. Os resultados obtidos foram de um aumento de 24% para 100% na confiabilidade do produto para cinco anos de utilização e de 0% para 83% para dez anos de utilização. Os valores obtidos de confiabilidade superaram os valores planejados, confirmando a eficiência da metodologia adotada. / This study discusses the relevance of Product Reliability Management during the product development phase. It consists of a systematic process that results in achieving the requirements of government regulations, customer satisfaction and companies goals. We studied the Product Reliability Management methodology through five aspects, including: target planning, optimal allocation, evaluation and modeling of product reliability, growth planning, and growth control to achieve the planned results. Using this methodology, applied in a study comprising the analysis of a medical product, it was possible to: (a) identify the critical components of the product (b) identify the gap between the reliability rate at the beginning of the project when compared to the final target (c) plan the growth of reliability throughout the phases of the project (d) make improvements or redesign product components (e) control the growth of reliability and (f) achieve the planned product reliability. The obtained results show an increase of 24% to 100% on five years product reliability, and from 0% to 83% for ten years product reliability. The values of reliability exceeded the planned values, confirming the effectiveness of the Product Reliability Management methodology.

Dans ce travail, nous étudions l’évaluation de la fiabilité, la modélisation et l’optimisation de systèmes à états arbitraires à incertitude épistémique. Tout d'abord, une approche universelle de modélisation à l'état arbitraire est proposée afin d'étudier efficacement les systèmes industriels modernes aux structures, mécanismes de fonctionnement et exigences de fiabilité de plus en plus complexes. De simples implémentations de modèles de fiabilité binaires, continus ou multi-états traditionnels ont montré leurs lacunes en termes de manque de généralité lors de la modélisation de structures, systèmes, réseaux et systèmes de systèmes industriels modernes et complexes. Dans ce travail, nous intéressons aussi particulièrement aux systèmes monotones, non seulement parce que la monotonie est apparue couramment dans la plupart des modèles de fiabilité standard, mais aussi qu’une propriété mathématique aussi simple permet une simplification énorme de nombreux problèmes extrêmement complexes. Ensuite, pour les systèmes de fiabilité monotones à états arbitraires, nous essayons de résoudre les problèmes suivants, qui sont apparus dans les principes mêmes de la modélisation mathématique: 1. L’évaluation de la fiabilité dans un environnement incertain épistémique avec des structures hiérarchiques être exploitées par toute approche de programmation 2; l'optimisation de la fiabilité / maintenance pour les systèmes à grande fiabilité avec incertitude épistémique. / In this work, we study the reliability assessment, modeling and optimization of arbitrary-state systems with epistemic uncertainty. Firstly, a universal arbitrary-state modelling approach is proposed, in order to effectively study the modern industrial systems with increasingly complicated structures, operation mechanisms and reliability demands. Simple implementations of traditional binary, continuous or multi-state reliability models have been showing their deficiencies in lack of generality, when modelling such complex modern industrial structures, systems, networks and systems-of-systems. In this work, we are also particularly interested in monotone systems, not only because monotonicity commonly appeared in most of the standard reliability models, but also that such a simple mathematical property allows a huge simplification to many extremely complex problems. Then, for the arbitrary-state monotone reliability systems, we try to solve the following challenges that appeared in its very fundamentals of mathematical modeling: 1. The reliability assessment under epistemic uncertain environment with hierarchy structures; 2. The reliability/maintenance optimization for large reliability systems under epistemic uncertainty.