La révision du code est un procédé essentiel quelque soit la maturité d'un projet; elle cherche à évaluer la contribution apportée par le code soumis par les développeurs. En principe, la révision du code améliore la qualité des changements de code (patches) avant qu'ils ne soient validés dans le repertoire maître du projet. En pratique, l'exécution de ce procédé n'exclu pas la possibilité que certains bugs passent inaperçus. Dans ce document, nous présentons une étude empirique enquétant la révision du code d'un grand projet open source. Nous investissons les relations entre les inspections des reviewers et les facteurs, sur les plans personnel et temporel, qui pourraient affecter la qualité de telles inspections.Premiérement, nous relatons une étude quantitative dans laquelle nous utilisons l'algorithme SSZ pour détecter les modifications et les changements de code favorisant la création de bogues (bug-inducing changes) que nous avons lié avec l'information contenue dans les révisions de code (code review information) extraites du systéme de traçage des erreurs (issue tracking system). Nous avons découvert que les raisons pour lesquelles les réviseurs manquent certains bogues était corrélées autant à leurs caractéristiques personnelles qu'aux propriétés techniques des corrections en cours de revue. Ensuite, nous relatons une étude qualitative invitant les développeurs de chez Mozilla à nous donner leur opinion concernant les attributs favorables à la bonne formulation d'une révision de code. Les résultats de notre sondage suggèrent que les développeurs considèrent les aspects techniques (taille de la correction, nombre de chunks et de modules) autant que les caractéristiques personnelles (l'expérience et review queue) comme des facteurs influant fortement la qualité des revues de code. / Code review is an essential element of any mature software development project; it aims at evaluating code contributions submitted by developers. In principle, code review should improve the quality of code changes (patches) before they are committed to the project's master repository. In practice, the execution of this process can allow bugs to get in unnoticed. In this thesis, we present an empirical study investigating code review of a large open source project. We explore the relationship between reviewers'code inspections and personal, temporal and participation factors that might affect the quality of such inspections. We first report a quantitative study in which we applied the SZZ algorithm to detect bug-inducing changes that were then linked to the code review information extracted from the issue tracking system. We found that the reasons why reviewers miss bugs are related to both their personal characteristics, as well as the technical properties of the patches under review. We then report a qualitative study that aims at soliciting opinions from Mozilla developers on their perception of the attributes associated with a well-done code review. The results of our survey suggest that developers find both technical (patch size, number of chunks, and module) and personal factors (reviewer's experience and review queue) to be strong contributors to the review quality.

Les typologies de parlementaires occupent une place centrale dans les études parlementaires.Nous proposons une définition du concept de «style de représentation», centrée sur lescaractéristiques déclarées des parlementaires - permettant de traiter les caractéristiques des élusdans leur diversité en examinant le spectre le plus large possible d’activités représentatives - et desaisir la manière dont ces activités s’articulent entre le niveau local et le niveau national. Ceconcept nous permettra d’étudier empiriquement les liens entre les styles de représentation -dansnotre cas des sénateurs français-, leurs déterminants et leurs effets comportementaux et desurmonter ainsi le descriptivisme propre à beaucoup d'études mobilisant des types parlementaires.L'analyse de cinq styles de représentation des sénateurs français met en évidence que les stylesde représentation sont des réponses aux contraintes et ressources des parlementaires et qu’ilsaffectent de manière systématique le comportement des sénateurs. / Typologies of parliamentarians play a central role in the study of legislators and their behavior. Wepropose a narrow concept of styles of representation, focused on the expressed characteristics ofparliamentarians and taking into account the largest possible spectrum of representational activitiesincluding the local and the national arena of the mandate.This concept enables us to study empirically the links between styles of representations -in ourcase of French senators-, their determinants and behavioral effects and to overcome thedescriptiveness of many studies mobilizing typologies of parliamentarians.The analysis of five styles of representation of the French senators show, that these styles areanswers to the constraints and resources of the parliamentarians and that they affect the senators’behavior in a systematic manner.

Drawing on the study of knowledge and action as a reference, this thesis explores how practitioners in two different firms perform their practice, 'knowing' and 'acting' simultaneously. It argues that types of knowledge, activities, individuals and context are interwoven at the moment of acting. However, this relationship is not static. The empirical work in a local labour placement company and in a multinational consultancy firm shows that practitioners resort to a host of different expressions of knowledge (or bundle of knowledge) when acting. Therefore, the prevailing role of explicit knowledge and the need for being a precedent in order to be applied is called into question.The empirical work also reveals that the bundle of knowledge is not static. It evolves over time and at the same time the prevailing type of knowledge varies depending on the type of practice and the practitioner's level of expertise. Therefore, the results underscore the fact that the relationship between knowledge and action is more dynamic and that both interplay simultaneously. Finally, this research shows that formal company categorisations (senior/junior) describe different practices rather than correspond to differential stocks of formal knowledge. This means that even when experts and novices apparently seem to be doing the same job, their actions are different as they are constituted through different combinations of knowledge types and orders of relevance. These results seem to point toward the fact that the essence of expertise resides in the expert's ability to reframe. He is able to reconstruct practice, whether by reframing his tasks or the overarching context.

Unternehmen, die den organisierten Kapitalmarkt in Anspruch nehmen, steuern sich zunehmend und mehrheitlich nach den Methoden einer am Wert des Unternehmens ausgerichteten Unternehmensführung. Bei börsennotierten Unternehmen wurden bereits seit Mitte der 1990er Jahre empirische Untersuchungen zum Stand der Anwendung wertorientierter Unternehmensführungsmethoden durchgeführt. Für deutsche, mittelständische Unternehmen existieren diesbezüglich noch keine Untersuchungen. 2.000 mittels einer geschichteten Zufalls-stichprobe ausgewählte Unternehmen wurden mit Hilfe einer strukturierten schriftlichen Befragung danach untersucht, wie weit eine wertorientierte Denkhaltung und die verschiedenen Facetten der wertorientierten Unternehmensführung in mittelständischen Unternehmen verbreitet sind und was wesentliche Einflussfaktoren, die den Einsatz wertorientierter Methoden fördern bzw. hemmen darstellen. Auf der Basis von 307 auswertbaren Fragebögen (Rücklauf-quote 15,4 %) können wertvolle Ergebnisse zur Einstellung des Managements bzw. der Ei-gentümer zur wertorientierten Steuerung, zu eingesetzten Methoden und zur Verzahnung mit anderen Managementsystemen gewonnen werden. / Companies using the organized capital market are increasingly and dominantly controlled by management methods that focus on a company’s value. Already since the mid-1990s empirical studies have been conducted about the dispersion of value-based management methods in listed companies. But, there have been no such studies of German SMEs. In our study, 2,000 German small- and medium-sized companies randomly selected through a stratified sample are investigated by using a standardized written questionnaire to receive information about the dispersion of value-orientated attitudes, application of value-based management methods, and factors of influence supporting or hindering the diffusion of value-based management in German SMEs. Based on 307 usable questionnaires (response rate 15.4 %) valuable insights have been gained into the attitudes of managers and owners about value based management, applied methods, and interconnections with other management systems.

[pt] Uma Linha de Produtos de Sistemas Multi-agentes (LP-SMA) define uma arquitetura de linha de produto de software (LPS) cujo projeto e implementação são realizados usando agentes de software para compreender features comuns e variáveis. O desenvolvimento de LP-SMA pode ser feito através de plataformas específicas de SMA e técnicas de implementação. Exemplos de tais técnicas são: frameworks orientados a objetos, compilação condicional, arquivos de configuração e programação orientada a aspectos (POA). Todavia, os estudos empíricos existentes não focam na abordagem de LP-SMA, considerando diferentes técnicas de implementação e plataformas específicas de desenvolvimento de SMA. Nesse contexto, este trabalho apresenta uma comparação sistemática de diferentes técnicas de implementação de variabilidades de features de agentes no domínio de LP-SMA. Esta comparação sistemática envolveu o uso de duas plataformas de desenvolvimento de SMA (JADE e Jadex) e das técnicas de implementação: compilação condicional, arquivos de configuração e POA. Neste estudo, um conjunto de métricas de software foram utilizadas para avaliar atributos de qualidade, tais como modularidade e estabilidade. Para a realização deste estudo, duas LP-SMAs foram desenvolvidas. A primeira foi a LP-SMA do Expert Committee, uma linha de produto de sistemas de gerenciamento de conferências. A segunda foi a LP-SMA OLIS, que provê diversos serviços pessoais para os usuários. Os dados coletados durante a realização dos estudos empíricos permitiram o relato de um conjunto de lições aprendidas. / [en] A Multi-agent System Product Line (MAS-PL) defines a Software Product Line (SPL) architecture whose design and implementation are accomplished using software agents to address its common and variable features. The MAS-PL development can be performed through MAS specific platforms and implementation techniques. Examples of such techniques are: object-oriented frameworks, conditional compilation, configuration files and aspect-oriented programming (AOP). However, the existing empirical studies do not focus on MAS-PL approach, considering different implementation techniques and MAS specific platforms. In this context, this work presents a systematic comparison of different variability implementation techniques of agent features in the MAS-PL domain. This systematic comparison involved the use of two platforms of MAS development (JADE and Jadex) and implementation techniques conditional compilation, configuration files and AOP. In this study, a suite of software metries were used to evaluate quality attributes, such as modularity and stability. In order to perform this study, two MAS-PLs were developed. The first one was the Expert Commitee MAS-PL, a product line of conference management systems. The second one as the OLIS MAS-PL, which provides several personal services to the users. The collected data during the accomplished empirical studies allowed to report a set of lessons learned.

p. 1-115 / Submitted by Santiago Fabio (fabio.ssantiago@hotmail.com) on 2013-03-14T21:03:06Z No. of bitstreams: 1 9999.pdf: 810798 bytes, checksum: 1cc093c8ad8b27edcba959af1730c5bb (MD5) / Approved for entry into archive by Tatiana Lima(tatianasl@ufba.br) on 2013-04-08T16:24:17Z (GMT) No. of bitstreams: 1 9999.pdf: 810798 bytes, checksum: 1cc093c8ad8b27edcba959af1730c5bb (MD5) / Made available in DSpace on 2013-04-08T16:24:17Z (GMT). No. of bitstreams: 1 9999.pdf: 810798 bytes, checksum: 1cc093c8ad8b27edcba959af1730c5bb (MD5) Previous issue date: 2005 / Este trabalho analisa a contribuição dos efeitos da estratégia da empresa, do setor em que ela opera, do grupo econômico a que pertence e da conjuntura econômica como um todo para a lucratividade das empresas brasileiras no período de 1996 a 2003. Também é verificada a evolução da contribuição destes fatores ao longo do período. Finalmente o modelo é testado com outra variável dependente, correspondendo às características da estrutura do capital das empresas. Os resultados demonstram que o principal elemento da lucratividade é a estratégia da empresa. A participação da estratégia vem aumentando nos últimos oito anos. Contrariamente ao esperado, o efeito da conjuntura é muito pequeno e semelhante ao encontrado no mercado americano. Também surpreende os resultados para a estrutura de capital. Ao contrário do esperado, o modelo revela uma importância ainda maior da estratégia, com uma pequena participação do mercado de atuação. / Salvador

New technology and new innovations have for long been considered as a spring for growth. Conservation farming (CF) is a new production method introduced in rural Zambia and previous research shows that it increases yields and improves soil fertility. Even though the method is proven more efficient than conventional agriculture, only approximately 10 % of Zambia’s farmers have adopted the method. The purpose of this study is to discuss the implications of the introduction of CF on the capabilities of farmers and on economic growth. Furthermore, the study aims to explore why CF, which is proven to be more economically efficient than the conventional method, is not adopted to a larger extent in Zambia. A qualitative study of 25 farmers, farming with either CF or conventional methods, was performed in the region of Mumbwa, Zambia. The results were divided depending on whether the farmers were using the new method or not. To analyze the selected material theories were chosen that regard economic growth and technological change, the adoption process of new innovations, incentive creation and the expansion of capabilities. The two groups showed differences in age, the size of their land, how many crops they grew and to what extent they were working for others or hiring labor. The conclusion from the small sample of farmers is that the farmers using CF had been able to expand their capabilities in different ways. They had food for all the year, the new method allowed them to plan their time better and it was more environmentally sustainable than the old method. The negative aspect of CF is that it is not compatible with the old method in terms of social norms. CF leads to a more efficient use of capital and labor and therefore it can increase the economic growth. In terms of a new innovation, CF seems to have a relative advantage over the old method but it must be spread to a larger group of farmers to reach a breakthrough. To create a higher adoption rate of the method the farmers’ perception must be taken into account. / Minor Field Study (Sida)

Unternehmen, die den organisierten Kapitalmarkt in Anspruch nehmen, steuern sich zunehmend und mehrheitlich nach den Methoden einer am Wert des Unternehmens ausgerichteten Unternehmensführung. Bei börsennotierten Unternehmen wurden bereits seit Mitte der 1990er Jahre empirische Untersuchungen zum Stand der Anwendung wertorientierter Unternehmensführungsmethoden durchgeführt. Für deutsche, mittelständische Unternehmen existieren diesbezüglich noch keine Untersuchungen. 2.000 mittels einer geschichteten Zufalls-stichprobe ausgewählte Unternehmen wurden mit Hilfe einer strukturierten schriftlichen Befragung danach untersucht, wie weit eine wertorientierte Denkhaltung und die verschiedenen Facetten der wertorientierten Unternehmensführung in mittelständischen Unternehmen verbreitet sind und was wesentliche Einflussfaktoren, die den Einsatz wertorientierter Methoden fördern bzw. hemmen darstellen. Auf der Basis von 307 auswertbaren Fragebögen (Rücklauf-quote 15,4 %) können wertvolle Ergebnisse zur Einstellung des Managements bzw. der Ei-gentümer zur wertorientierten Steuerung, zu eingesetzten Methoden und zur Verzahnung mit anderen Managementsystemen gewonnen werden. / Companies using the organized capital market are increasingly and dominantly controlled by management methods that focus on a company’s value. Already since the mid-1990s empirical studies have been conducted about the dispersion of value-based management methods in listed companies. But, there have been no such studies of German SMEs. In our study, 2,000 German small- and medium-sized companies randomly selected through a stratified sample are investigated by using a standardized written questionnaire to receive information about the dispersion of value-orientated attitudes, application of value-based management methods, and factors of influence supporting or hindering the diffusion of value-based management in German SMEs. Based on 307 usable questionnaires (response rate 15.4 %) valuable insights have been gained into the attitudes of managers and owners about value based management, applied methods, and interconnections with other management systems.

No description available.

[pt] A tese investiga as etapas do ciclo de planejamento de vendas e operações (S&OP), ampliando o entendimento sobre as etapas pouco pesquisadas do Global Roll-up e Global Executive Meeting. Apresenta um estudo de caso múltiplo, envolvendo cinco importantes subsidiárias latino-americanas de quatro corporações multinacionais. Dois modelos de S&OP são usados para orientar as observações e análises de campo, auxiliando na caracterização do fenômeno S&OP. Acadêmicos e profissionais podem obter conhecimento em primeira mão sobre como as etapas de Global Roll-up e Global Executive Meeting são conduzidas em corporações multinacionais para melhorar seus processos de planejamento. O papel do setor de finanças nos ciclos de S&OP/ Planejamento Integrado de Negócios (IBP) também é examinado e discutido em detalhe, fornecendo informações e ideias úteis para melhorar esses processos em outras organizações, abordando outra lacuna de pesquisa. Os resultados indicam que há desafios para consolidar e usar informações coletadas de várias subsidiárias em diferentes contextos em todo o mundo, mas benchmarking interno e compartilhamento de melhores práticas são explorados, bem como oportunidades de negócios entre países em relação a excessos de estoque, possibilidades de expansão do portfólio e utilização de capacidade ociosa. Adicionalmente, as observações permitiram concluir que o envolvimento precoce do setor de finanças no ciclo de S&OP é benéfico para o negócio, agregando valor ao processo decisório nas etapas iniciais e assumindo um papel central nas etapas de Premeeting e Executive Meeting do ciclo de S&OP. / [en] The thesis investigates the sales and operations planning (S&OP) cycle steps, expanding the understanding about the under-researched Global Roll-up and Global Executive Meeting steps. It presents a multiple case study embracing five important Latin American subsidiaries of four multinational corporations. Two S&OP frameworks are used to guide the field observations and analysis, aiding to improve the S&OP phenomenon s characterization. Scholars and practitioners can gain first-hand knowledge about how Global Roll-up and Global Executive Meeting steps are conducted in multinational corporations to improve their planning processes. The role of finance in S&OP / Integrated Business Planning (IBP) cycles is also examined and discussed in detail providing useful insights to improve these processes in other organizations, addressing another research gap. Findings indicate that there are challenges to consolidate and use information gathered from multiple subsidiaries in different contexts worldwide but internal benchmarking and sharing of best practices are explored as well as business opportunities among countries regarding inventory excess, portfolio expansion possibilities, and spare capacity utilization. Additionally, observations led to the conclusion that early involvement of finance in the S&OP cycle is beneficial for the business, adding value to the decision making process in the initial steps and taking a central role in the Pre-meeting and Executive Meeting steps.