Abstract [en]Customization and product development are crucial for competitiveness, and modular product architectures enable adaptation and improvement without extensive changes. Originally introduced by Starr in 1965, modular solutions aim to minimize costs through maximum part combination. In sanitation engineering, where water and sewage systems are critical, high-quality, and customized solutions are required. Uponor, a leading player in the field, offers prefabricated water cabinet units to distribute water to various devices. Based on this, a question has been formulated for the study to address: How can a modular product architecture be applied to water cabinets in plumbing and HVAC systems to reduce component costs and production time? The study introduces fundamental concepts in product architecture and modularity, detailing how products can be divided into modules and designed to function independently yet collaboratively. Modularity enables increased flexibility, lower costs, and simpler product development, while component standardization streamlines manufacturing and facilitates adaptation to customer requirements. Additionally, pipe flow and its impact on water distribution systems are discussed, focusing on pressure drops and legionella risks. The study resulted in two new components contributing to cost reduction within the product family, thanks to the modular product architecture. The components enable the company to reduce costs by 38 - 46 SEK per cabinet. This is a cost reduction of 7.5% to 9% for the specific subsystem. Abstract [sv]Kundanpassning och produktutveckling är avgörande för konkurrenskraft, och modulära produktarkitekturer möjliggör anpassning och förbättring utan omfattande ändringar (Modrak & Soltysova, 2018 ,Bouchard, et al, 2023). Ursprungligen introducerades modulära lösningar av Starr ((1965, refererad i Amend, et al, 2022).) för att minimera kostnader genom maximal kombination av delar. Inom sanitetsteknik, där vatten- och avloppssystem är avgörande, krävs högkvalitativa och kundanpassade lösningar. Uponor, en ledande aktör inom området, erbjuder prefabricerade tappvattenskåp för att distribuera vatten i olika enheter. Baserat på det här har en fråga formulerats som studien syftar till att besvara: Hur kan en modulär produktarkitektur för tappvattenskåp inom VVS tillämpas för att minska komponentkostnader och produktionstiden? Den teoretiska referensramen presenterar grundläggande begrepp inom produktarkitektur och modularitet, samt hur produkter kan delas upp i moduler och designas för att fungera oberoende men samverka. Modularitet möjliggör ökad flexibilitet, lägre kostnader och enklare produktutveckling, medan standardisering av komponenter effektiviserar tillverkning och möjliggör anpassning till kundkrav. Dessutom diskuteras rörströmning och dess påverkan på vattenledningssystem, med fokus på tryckfall och risker för legionella bakterier. Studien resulterade i två nya komponenter som bidrar till sänkta kostnader inom produktfamiljen, tack vare den modulära produktarkitekturen. Komponenterna möjliggör för företaget att reducera kostnaderna med 38 - 46 kronor per skåp.

The present study does not represent a general investigation of all the various divisions of the transportation phase of the petroleum industry but a very small segment of the industry, i.e., crude oil pipe lines. Rather than being an examination of the technical operations of the industry the study is directed towards a consideration of the instrumentalities of control of interstate pipe line facilities exercised at the hands of major or integrated companies.

The doctoral thesis deals with an analysis of thermoplastics pipes in a soil environment, in particularly, pipes performed by using trenchless technologies. In the doctoral thesis, experiments of polyethylene pipes loaded by external hydrostatic pressure were performed. The aim of the experiments was to determine a behaviour and load-bearing capacity of the polyethylene pipes loaded by external hydrostatic pressure. For the experiments, a steel pressure chamber was designed and produced which allowed loading and observing a pipe during its loss of the stability. Mechanical properties of the pipe material were determined based on the tensile and bending tests. The series of detailed numerical analyses of the pipe experiments were performed. Various material models which take into account elastic, plastic and viscous behaviour of thermoplastic materials were used. In addition, series of standardized calculations of polyethylene pipes installed using trenchless technologies were performed. The aim was to create new design diagrams for practical assessment of these pipes placed in the partially deteriorated old pipes. In the case of the deteriorated old pipe, a numerical model for determination of design coefficients was created. These design coefficients were verified with standard values. Then, the results of the numerical model were compared with the results of the more complex numerical model which better take into account pipe-soil interaction of various soil types.

For gaseous fire extinguishing systems, the maximum percent of agent in pipe, i.e., pipe volume vs. agent liquid volume should be determined for proper system design and performance by confirming the maximum length of pipe run in which their flow calculation methods can predict the discharge pressures and agent concentration. It is the purpose of this paper to determine the ability and limitations of the NFPA 12 flow calculation methodology to identify the maximum percent of agent in pipe by conducting full scale low-pressure CO2 system discharge tests. A total of twenty low-pressure CO2 system discharge tests were conducted under different conditions. If all the measured pressures at the three node points of pipe runs and the measured CO2 concentrations in the test enclosures did not deviate from the predicted values of computerized flow calculations by more than ¡¾10 percent, the tests were judged to be acceptable. In the test results, the low-pressure CO2 system with a pipe run exceeding 492 ft (150 m) was not likely to achieve the concentration required for fire extinguishment within the determined discharge time although the pipe network was installed in compliance with the calculations based on the pressure drop equation in NFPA 12.

Les boucles diphasiques à pompage thermo-capillaire de type LHP (pour Loop Heat Pipe, en anglais), dont le fonctionnement s’apparente à celui d’un caloduc, permettent un transfert de chaleur particulièrement efficace et entièrement passif entre une source chaude et une source froide. Ce transfert s’effectue au moyen d’un fluide diphasique, mû grâce à la force motrice capillaire générée par un matériau poreux contenu dans l’évaporateur/réservoir de la LHP. Outre son rôle de barrière hydraulique entre les phases liquide et vapeur, ce matériau doit assurer une fonction de barrière thermique afin de favoriser l’évaporation du liquide. L’aptitude du matériau à remplir ses fonctions dépend étroitement de sa microstructure, elle-même liée à la méthode de fabrication. Dès lors, l’objectif de la thèse est d’associer la science des matériaux à celle de la thermique, pour améliorer les procédures de fabrication de structures capillaires existantes ou tester de nouvelles méthodes, et aboutir à des structures dont les caractéristiques sont en adéquation avec celles qui sont recherchées. / The capillary pumped loops (CPL) or loop heat pipes (LHP), whom the operating principle is similar to classic heat pipes, enable an efficient heat transfer between a hot source and a cold source without additional energy sources. Indeed, a porous structure provides a capillary force that enables a two-phase fluid to circulate around the loop, transferring the heat from the evaporator to the condenser. The porous structure acts as a hydraulic barrier between the two phases and as a thermal barrier enabling the liquid evaporation. The ability of the capillary structure to fulfil its mission depends on its microstructure, and thus on the manufacturing process. Therefore, the objective of the present thesis is to join the thermal sciences with the material sciences in order to improve the existing manufacturing procedure or even to test new ones. It aims at obtaining capillary structures corresponding to heat transfer applications.

Este trabalho apresenta um estudo sobre o comportamento de tubos metálicos enterrados, submetidos ao carregamento móvel de um veículo. Foram realizadas análises numéricas utilizando o método de elementos finitos para o cálculo da tensão vertical no solo, momento fletor, tensão normal e deformação diametral vertical do tubo. Foram analisados 630 modelos, obtidos da variação das características do solo (módulo de elasticidade) com o objetivo de representar diferentes níveis de compactação do solo, características do tubo (espessura da parede do tubo) e da altura da camada de recobrimento do solo. O programa utilizado nas análises numéricas foi o SIGMA/W do pacote Geostudio. Os resultados encontrados apontam que as maiores tensões no solo, momentos, tensões normais e deformações no tubo ocorrem devido ao carregamento móvel quando este se localiza exatamente acima do tubo. Observou-se que o aumento da espessura da camada de solo que recobre a tubulação causa uma diminuição de 15% a 55% das tensões verticais no solo, momentos fletores, tensões normais e deformações no tubo. Foram desenvolvidas equações para o cálculo das deformações para os casos estudados. Foi também desenvolvido um procedimento para a moldagem de corpos de prova de areia no estado fofo (índice de vazios máximo) para realização de ensaios triaxiais. / This paper presents a study on the behavior of buried metal pipes, subjected to the vehicle live load. Numerical analysis using the finite element method to calculate the vertical stress were made on the ground, bending moment, normal stress and diametral vertical pipe deformation. 630 models were analyzed, obtained from the variation of the soil characteristics (modulus) in order to represent different levels of soil compaction, the pipe characteristics (thickness of the pipe wall) and the height of the soil cover layer. The program used in numerical analysis was the SIGMA/W Geostudio package. The results show that the highest stresses on the ground moments, normal stresses and strains in the tube occur due to live loading when it is located just above the tube. It was observed that increasing the thickness of the layer of soil covering the pipe causes a decrease from 15% to 55% of the vertical tensions in the ground, bending moments, normal stress and strain on the pipe. Equations were developed to calculate the deformations in the cases studied. It has also developed a procedure for molding sand specimens into the soft state (maximum void ratio) to perform triaxial tests.

France Télécom possède des armoires de télécommunication dont la puissance est limitée à cause de la dissipation thermique des équipements actifs qui entraîne une augmentation de leur température interne. La puissance des équipements limite le nombre de clients qu'il est possible de connecter aux services des réseaux à hauts débits. En plus de cette contrainte, les armoires sont soumises à des effets liés au climat (ensoleillement) qui peuvent être sévères et difficiles à maîtriser. Ceci nécessite l’intégration de systèmes de refroidissement permettant de maintenir la température des composants en dessous de la limite imposée (55°C). C’est dans cet objectif que ce travail de thèse a été mené au sein du laboratoire FEMTO-ST en collaboration avec le service R&D de France Télécom à Lannion. Le refroidissement par changement de phase est favorisé pour maintenir la température de fonctionnement du système stable et pour être utilisé dans les systèmes à haute densité de puissance. Les boucles diphasiques sont des systèmes de refroidissement pour le contrôle thermique et fonctionnent passivement sans pompage mécanique du fluide caloporteur. Après une étude bibliographique sur les boucles de refroidissement diphasiques et leurs applications, on a constaté que les boucles thermosiphons sont particulièrement adaptées aux applications où le faible coût, l'efficacité énergétique et la fiabilité d’entretien sont souhaités. Cette étude a été conduite en suivant un cahier de charge proposé par France Télécom qui consiste à : (i) développer un modèle numérique permettant de modéliser les transferts échangés entre l’armoire de télécommunication et le milieu ambiant, (ii) mener une étude expérimentale en vue de concevoir une boucle thermosiphon pour le refroidissement d’armoires de télécommunication.Le mémoire de cette thèse montre la limitation des systèmes de refroidissement classiques utilisant des écoulements d’air en convection forcée ou autre fluides sans changement de phase. Un modèle numérique est développé afin de permettre la prédiction des températures à l’entrée des boitiers chauffants pour différentes conditions climatiques. Le choix est porté sur l’utilisation d’une modélisation par réseau nodal. La modélisation est effectuée en tridimensionnel et en régime transitoire. Nous avons également modélisé le rayonnement solaire auquel est soumise l’armoire de télécommunication. Le modèle développé a été validé en effectuant une comparaison entre les résultats issus de la modélisation et ceux obtenus à partir des expériences menées au laboratoire et à la plateforme CLIMA chez France Télécom. Les essais sont effectués en régime transitoire en imposant une puissance électrique et en faisant varier la température ambiante ou la densité de flux thermique solaire. L’ensemble des résultats obtenus ont permis de constituer une base de données. Le deuxième objectif fixé dans le cadre de ce travail de thèse est la conception d’un système de refroidissement sous forme d’une boucle thermosiphon. La contrainte principale qui a guidée cette conception était le fait que la boucle doit refroidir l’armoire et assurer une température d’air à l’entrée des équipements inférieure à la limite imposée par la norme ETSI. Ceci nous a mené à concevoir un prototype de boucle thermosiphon dont la puissance thermique qu’il doit dissiper est imposée. On a montré que ce prototype permet de dissiper des puissances thermiques allant jusqu’à 470 W en utilisant une petite charge de npentane. Nous avons effectué des essais sur le refroidissement du prototype d’armoire de télécommunication en utilisant la boucle thermosiphon légèrement modifiée. On montre que les performances thermiques obtenues en utilisant un mode de refroidissement en boucle thermosiphon sont meilleures. Les boucles thermosiphons semblent intéressantes pour un refroidissement passif de matériels déployés dans un réseau de télécommunication... / France Telecom owns telecommunication cabinets whose power is limited because of the heat dissipation of active devices which leads to increased internal temperature. Power equipment limits the number of clients that can connect to networks services with high data rates. In addition to this constraint, the cabinets are subject to climate-related impacts (sunlight) that can be severe and difficult to master. This requires the integration of cooling systems to maintain the temperature of components below the limit (55 ° C). It is with this aim that this work was conducted in the laboratory Femto-ST in collaboration with the R & D department of France Telecom in Lannion.Cooling the phase change is promoted to maintain the operating temperature of the stable and system for use in systems with high power density. The loops are two-phase cooling systems for thermal control and operate passively without mechanical pumping of the coolant.After a literature review on two-phase cooling loops and their applications, it was found that the thermosyphon loops are particularly suitable for applications where low cost, energy efficiency and reliability maintenance are desired. This study was conducted by following a set of specifications proposed by France Telecom which involves: (i) develop a numerical model to model transfers exchanged between the cabinet and the telecommunications environment, (ii) conduct an experimental study to design a thermosyphon loop for cooling telecommunication cabinets.The memory of this thesis shows the limitation of conventional cooling systems using air flow forced convection or other fluids without phase change. A numerical model is developed to enable the prediction of temperatures at the inlet of heated enclosures for different climatic conditions. The choice is focused on the use of a nodal network modeling. The modeling is done by three-dimensional and transient. We also modeled the solar radiation, which applies to the telecommunications closet. The developed model was validated by comparison between the results of modeling and those obtained from experiments in the laboratory and platform CLIMA at France Telecom. The tests are performed by imposing transient electrical power and varying the temperature or heat flux density solar. All the results obtained allowed to establish a database.The second goal as part of this thesis is the design of a cooling system as a thermosyphon loop. The main constraint has guided this design was that the loop needs to cool the cabinet and provide air temperature at the inlet of the equipment below the limit imposed by the ETSI. This led us to design a prototype of thermosyphon loop with a heat output that must be dissipated is imposed. We showed that this prototype is used to dissipate the heat ratings up to 470 W using a small load of npentane.We conducted tests on the prototype cooling telecommunication cabinet using slightly modified thermosyphon loop. We show that the thermal performance obtained by using a cooling mode loop thermosyphon are better. Thermosyphon loops seem interesting for passive cooling of equipment deployed in a telecommunications network. Indeed, being able to use an air conditioning system independent and requires no energy should be promoted in a reduction of overall energy consumption.

Submitted by MARCIA RODRIGUES LUIZ DA SILVA null (marcia_rodrigues_fucamp@yahoo.com.br) on 2016-05-08T02:05:44Z No. of bitstreams: 1 TESE Márcia Luiz.pdf: 15629727 bytes, checksum: 663e5af045c005752feac3a5049ea727 (MD5) / Approved for entry into archive by Felipe Augusto Arakaki (arakaki@reitoria.unesp.br) on 2016-05-09T19:25:17Z (GMT) No. of bitstreams: 1 silva_mrl_dr_rcla.pdf: 15629727 bytes, checksum: 663e5af045c005752feac3a5049ea727 (MD5) / Made available in DSpace on 2016-05-09T19:25:17Z (GMT). No. of bitstreams: 1 silva_mrl_dr_rcla.pdf: 15629727 bytes, checksum: 663e5af045c005752feac3a5049ea727 (MD5) Previous issue date: 2016-03-21 / Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) / O presente estudo insere-se no campo da formação inicial de professores de Matemática em nível superior, em Cursos de Graduação. Tendo como contexto o Curso de Graduação em Matemática na Universidade Federal de Uberlândia (UFU), em Uberlândia/Minas Gerais, dialoga acerca da questão da Prática Como Componente Curricular (PCC) inserida nos currículos dos Cursos de Licenciatura como modalidade diferenciada de prática curricular a partir da Resolução CNE/CP nº. 01/2002 que instituiu as Diretrizes Curriculares Nacionais para a formação de Professores nesse nível. De caráter qualitativo, a pesquisa investigou, no âmbito da disciplina Estatística e Probabilidade do currículo do referido Curso, o processo de implementação do Projeto Integrado de Prática Educativa (PIPE) – componente curricular criada pela UFU para o desenvolvimento dessa modalidade de prática instituída pelas Diretrizes. Como objetivo geral o estudo buscou investigar, neste Curso de Matemática, a implementação do PIPE como PCC no desenvolvimento dessa disciplina e suas implicações na formação inicial do Professor de Matemática, norteando-se pela seguinte questão diretriz: Como vem ocorrendo o processo de implementação do Projeto Integrado de Prática Educativa (PIPE) na disciplina Estatística e Probabilidade no Curso de Graduação em Matemática da Universidade Federal de Uberlândia a partir de sua inserção como Prática como Componente Curricular neste Curso? O estudo desenvolveu-se por meio da pesquisa documental e de campo, tomando como sujeitos os professores e estudantes nessa disciplina e Curso, durante cinco semestres letivos (período de 2012 a 2014). A produção de dados se deu, além da parte documental e dos registros da pesquisadora no diário de campo, também por meio de entrevistas com os docentes, questionários aplicados aos alunos e um ambiente virtual criado pela pesquisadora no desenvolvimento da pesquisa. Os principais resultados evidenciaram a deficiência de registros de experiências com relação ao desenvolvimento do PIPE. Mostraram também que os diferentes sujeitos participantes da Pesquisa consideram o PIPE importante e necessário no Curso de Matemática por possibilitar, no desenvolvimento dessa Prática Curricular, um espaço diferenciado de formação, no entanto, há dúvidas conceituais em relação a essa componente e divergências de visão dos docentes entre si e deles com o Projeto Pedagógico do Curso quanto à concepção da PCC via PIPE, o que tem levado a diferentes formas de interpretá-lo e, portanto, efetivá-lo. Apontaram carência de esclarecimentos sobre essa Prática nos documentos institucionais e de uma maior comunicação dentro do Curso, sugerindo-se, para tanto, a implementação de um espaço de troca de experiências no âmbito do desenvolvimento do PIPE, aliado a um processo contínuo e permanente de acompanhamento e avaliação, para seu aprimoramento e efetividade. Por meio das cinco experiências vivenciadas no campo concluiu-se que o PIPE caracteriza-se como um tipo de prática que demanda um trabalho interdisciplinar e coletivo e por isso tem representado ainda um grande desafio para o Curso de Matemática, mas que, apesar disso não é uma proposta frágil, mas possível e viável, especialmente mediante a possibilidade de socialização de experiências e de uma responsabilidade que seja compartilhada entre todos os envolvidos e não exclusiva dos docentes. / This study is in the initial teacher training in Mathematics at higher education in undergraduate courses. With the context the Undergraduate course in Mathematics at the Federal University of Uberlandia (UFU) in Uberlandia/Minas Gerais, dialogue on the issue of the practice as Curriculum Component (PCC ) inserted in the curricula of undergraduate courses as differentiated mode of the practice from the CNE / CP Nº. 01/2002 resolution that instituted the National Curricular Guidelines for teacher training in this level. From a qualitative character, the research investigated, under the Statistics and Probability discipline, the curriculum of the mentioned course, the implementation process of the Integrated Project of Educational Practice (PIPE) – a curricular component created by UFU to the development of this type of practice established by the Guidelines. The general objective of the study was to investigate, in the Mathematics course, the implementation of the PIPE as PCC in the development of this discipline and its implications for initial training of Mathematic teachers, guiding by the guideline question : How has occurred the implementing process of the Integrated Project of Educational Practice (PIPE ) in Statistics and Probability discipline in the Undergraduate Course in Mathematic of the Federal University of Uberlandia from its insertion as Practice as Curricular Component in this course? The study was developed through the documental research and of field, taking as subject the teachers and students in this discipline and course, for five semesters (from 2012 to 2014). The production data was, beyond the documentary part and the researcher records in the field diary, also through interviews with the teachers, questionnaires to students and a virtual environment created by the researcher in the development of the research. The main results showed the deficiency of experience records regarding the development of the PIPE. They also showed that the different participants in the research consider the PIPE important and necessary in the Mathematics Course for enabling, in the development of this Curriculum Practice, a differential space training, however, there are conceptual questions regarding this component and view differences of the teachers with the pedagogical project of the course on the design of the PCC via PIPE, which has led to different ways of interpreting it and, thus, accomplish it. They showed lack of clarification on this practice in the institutional documents and greater communication within the course, suggesting, therefore, the implementation of an exchange experiences space in the PIPE development, combined with a continuous and ongoing process of monitoring and evaluation for its improvement and effectiveness. Through the five experiences in the field it concluded that the PIPE characterized as a kind of practice that requires an interdisciplinary and collective work and so has also represented a major challenge for the Mathematic course, but, nevertheless it is not a weak proposal, but possible and feasible, especially by the possibility of socialization and of a responsibility that is shared between the involved participants and not exclusive for teachers.

Cette thèse porte sur la Conception Centrée Valeur (CCV) proposé par Gilbert Cockton dans le but d'aller au-delà de l'utilisabilité dans les systèmes interactifs. L'auteur propose un canevas pour la mise en oeuvre de la CCV. Cependant, les opérationnalisations restent partielles et sont réalisées par lui-même, d'où un manque de recul de la communauté vis-à-vis de la méthode. La thèse relate la conception centrée valeur de Cocoon, un système d'information mobile et sensible au contexte. Elle apporte des contributions à la fois sur les plans conceptuel et méthodologique. D'un point de vue conceptuel, elle introduit la taxonomie PIPE (Personnelle, Impersonnelle, Pérenne, Éphémère) pour la caractérisation de l'information. En outre, elle montre que les systèmes existants ne couvrent pas PIPE : ils sont surtout focalisés sur les informations impersonnelles. Alors, la thèse propose le concept d'arbre de vie et Cocoon. D'un point de vue méthodologique, la thèse apporte une compréhension meilleure de la notion de valeur. En outre, elle fournit un retour d'expérience sur la CCV accompagné de remarques et recommandations pour des mises en oeuvres futures plus performantes. Enfin, elle propose un canevas pour la construction des cartes de valeur et une stratégie pour l'estimation de la valeur. / The thesis deals with Worth Centered Design (WCD) introduced by Gilbert Cockton. The author also introduced a framework aimed to support the WCD operationalization. However, this framework has been operationalized only partially until now and by Gilbert Cockton himself. The thesis relates our WCD experience with Cocoon, a mobile and context-aware information system. The thesis contributions are both conceptual and methodological. From a conceptual point of view, we introduce the PIPE (Personal, Impersonal, Perennial, Ephemeral) taxonomy for information characterization and show that existing systems only partially covers the PIPE information space: they focus on impersonal information. This notice motivated us to propose the life tree concept and Cocoon. From a methodological point of view, we offer a feedback to the community on an interesting concept method as well as recommendations for more efficient operationalizations. In addition, we introduce a framework for worth maps construction and a strategy for worth assessment.

Made available in DSpace on 2016-06-02T19:16:30Z (GMT). No. of bitstreams: 1 4176.pdf: 1346864 bytes, checksum: 19295b7105b343b7dd8999fbc6078459 (MD5) Previous issue date: 2012-01-25 / This dissertation presents a proposed methodology for monitoring corporate mortality, and some results of its use to evaluate the mortality of technology-based companies in São Carlos, SP. The proposed methodology comprises 12 steps, and provides guidelines for defining the criteria for characterization of mortality (Stage I), selection of sources of information (Stages II and III), choice of the period of observation (Stage V), construction of the universe of research (Stages VII and VIII), determining rates of mortality (Stage XI), and identification of causes of death (Stage XII). The methodology also guides actions for routine monitoring of corporate mortality, and to compare results. The methodology was applied to evaluate the mortality of technology-based companies in São Carlos. The universe of the research was formed by the companies created by the year 2005, organized in four entries, namely ParqTec, GETEC, PIPE, and São Carlos. The criterion used for mortality was the formal closure, as detected in the JUCESP (Board of Trade of São Paulo State), and Internal Revenue Service taxpayer number (CNPJ). The period of observation of mortality ranged between 2006 and 2010. The following mortality rates were obtained: 5.2% of the companies from ParqTec established by 2005 formally ended their activities from 2006 to 2010. Similarly, the mortality was 6.8% of GETEC register, PIPE 0% and the rate of São Carlos register was 5.6%. The causes of death were explored by consulting the leaders of the companies closed. Due to the small number of responses, 8 questionnaires, the results regarding causes of death should not be regarded as conclusive. The methodology contributes primarily to guide the process of designing and implementing research to evaluate business mortality, to guide the choice of methodological alternatives, and comparing results. / Este trabalho apresenta uma proposta de metodologia para monitoramento da mortalidade empresarial, e resultados de sua utilização para avaliação da mortalidade das empresas de base tecnológica do município de São Carlos - SP. A metodologia proposta é composta por 12 etapas, e provê orientações para definição do critério para caracterização da mortalidade (Etapa I), seleção das fontes de informação (Etapas II e III), escolha do período de observação (Etapa V), construção do universo de pesquisa (Etapas VII e VIII), determinação de taxas de mortalidade (Etapa XI) e identificação das causas de mortalidade (Etapa XII). A metodologia também orienta ações para monitoramento rotineiro da mortalidade empresarial, e para a comparação de resultados. A metodologia foi aplicada para avaliação da mortalidade das empresas de base tecnológica do município de São Carlos - SP. Fizeram parte do universo de pesquisa as empresas criadas até o ano de 2005, organizadas em quatro cadastros ParqTec, GETEC, PIPE e São Carlos. O critério de mortalidade adotado foi o Encerramento Formal, detectado na JUCESP (Junta Comercial do Estado de São Paulo) e na Secretaria da Receita Federal CNPJ. O período de observação da mortalidade compreendeu os anos de 2006 a 2010. Foram obtidas as seguintes taxas de mortalidade: 5,2% das empresas do ParqTec constituídas até 2005 encerraram formalmente suas atividades entre 2006 a 2010. Analogamente, a mortalidade do Cadastro GETEC foi 6,8%, do PIPE 0%, e a taxa do Cadastro São Carlos foi 5,6%. As causas de mortalidade foram exploradas através de consulta aos dirigentes das empresas encerradas. Devido ao baixo número de respostas 8 questionários os resultados obtidos quanto a causas de mortalidade não devem ser considerados como conclusivos. A metodologia contribui principalmente para orientar o processo de concepção e execução de pesquisas para avaliação da mortalidade empresarial, para orientar a escolha de alternativas metodológicas, e a comparação de resultados.