Kam Wai-ming. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2001. / Includes bibliographical references (leaves 153-162). / Abstracts in English and Chinese ; questionnaire in Chinese. / List of Tables --- p.x / List of Figures --- p.xiii / List of Abbreviation --- p.xvi / Chapter Chapter One --- Introduction --- p.1 / Chapter 1.1 --- Introduction --- p.1 / Chapter 1.2 --- The Research Problems --- p.2 / Chapter 1.3 --- Objectives of the Study --- p.4 / Chapter 1.4 --- Study Area --- p.4 / Chapter 1.5 --- Significance of the Study --- p.8 / Chapter 1.6 --- Organization of Thesis --- p.9 / Chapter Chapter Two --- Literature Review --- p.11 / Chapter 2.1 --- Pedestrianization: Basic Ideas and History --- p.11 / Chapter 2.1.1 --- Definition of Pedestrianization --- p.11 / Chapter 2.1.2 --- Motivation of pedestrianization --- p.13 / Chapter 2.1.3 --- Learning from the Development of Pedestrianization in Other Cities --- p.15 / Chapter 2.1.4 --- Impacts of Pedestrianization on Environment --- p.19 / Chapter 2.2 --- Pedestrianization in Hong Kong --- p.21 / Chapter 2.2.1 --- Development --- p.21 / Chapter 2.2.2 --- Ways for Successful Pedestrianization in Hong Kong --- p.22 / Chapter 2.3 --- Human Perception and Response on Air Pollution and Pedestrianization --- p.24 / Chapter 2.3.1 --- Introduction of Human Perception --- p.24 / Chapter 2.3.2 --- Human Perception of Air Pollution --- p.27 / Chapter 2.3.3 --- Changes of Human Perception in Response to the Changes of Environmental Quality After Pedestrianization --- p.31 / Chapter Chapter Three --- Methodology --- p.34 / Chapter 3.1 --- Research Design --- p.34 / Chapter 3.2 --- BACIPR Approach --- p.35 / Chapter 3.3 --- Objective Assessment of the influence of pedestrianization on air quality --- p.38 / Chapter 3.3.1 --- Model Prediction --- p.39 / Chapter 3.3.2 --- Physical Measurement of Particulates --- p.46 / Chapter 3.4 --- Subjective Assessment: Human Perception of Roadside Air Pollution --- p.56 / Chapter 3.4.1 --- Guidelines Used for Subjective Assessment --- p.57 / Chapter 3.4.2 --- Development of the Questionnaire --- p.58 / Chapter 3.4.3 --- Statistical Analysis --- p.59 / Chapter Chapter Four --- Model Simulation of the Effect of Pedestrianization on Air Quality --- p.61 / Chapter 4.1 --- Introduction --- p.61 / Chapter 4.2 --- Air Quality in Causeway Bay Before Pedestrianization --- p.64 / Chapter 4.2.1 --- Overall Spatial Variation of Air Quality --- p.64 / Chapter 4.2.2 --- Respiratory Suspended Particulate (RSP) --- p.67 / Chapter 4.2.3 --- Nitrogen Dioxide (N02) --- p.68 / Chapter 4.2.4 --- Carbon Monoxide (CO) --- p.69 / Chapter 4.3 --- Air Quality in Causeway Bay After Pedestrianization --- p.70 / Chapter 4.3.1 --- Overall Spatial Variation of Air Quality --- p.70 / Chapter 4.3.2 --- Respiratory Suspended Particulate (RSP) --- p.70 / Chapter 4.3.3 --- Nitrogen Dioxide (N02) --- p.73 / Chapter 4.3.4 --- Carbon Monoxide (CO) --- p.75 / Chapter 4.3.5 --- Effect of Government's Pedestrianization Scheme in Improving Air Quality --- p.77 / Chapter 4.4 --- Air Quality Impact of Pedestrianization in Single Street --- p.77 / Chapter 4.4.1 --- RSP Concentration in Russell Street Section Before Pedestrianization --- p.78 / Chapter 4.4.2 --- RSP Concentration in Russell Street Section After Pedestrianization --- p.81 / Chapter 4.5 --- Summary and Conclusion --- p.83 / Chapter Chapter Five --- Measurement of Particulate Pollution in Causeway Bay --- p.84 / Chapter 5.1 --- Change in Particulate Pollution After Pedestrianization in Russell Street --- p.86 / Chapter 5.1.1 --- Overall Changes in Particulate Pollution after Pedestrianization --- p.86 / Chapter 5.1.2 --- Changes in Particulate Pollution after Pedestrianization under Different Weather Conditions --- p.87 / Chapter 5.1.2.1 --- Effects of Pedestrianization on Fine Day --- p.88 / Chapter 5.1.2.2 --- Effects of Pedestrianization on Rainy Days --- p.89 / Chapter 5.1.3 --- Changes of Particulate Pollution after Pedestrianization under Different Traffic Flow Conditions --- p.90 / Chapter 5.1.3.1 --- Effects of Pedestrianization during Peak Hours --- p.91 / Chapter 5.1.3.2 --- Effects of Pedestrianization during Non-Peak Hours --- p.92 / Chapter 5.1.4 --- Changes in Particulate Pollution As a result of Pedestrianization on Different Days of the Week --- p.93 / Chapter 5.1.4.1 --- Effects of Pedestrianization on Weekdays --- p.94 / Chapter 5.1.4.2 --- Effects of Pedestrianization on Non-Weekdays --- p.94 / Chapter 5.1.5 --- Change in PM 10 I/C ratio After Pedestrianization --- p.95 / Chapter 5.2 --- Variations in Particulate Pollution Characteristics Due to Different Pedestrianization Street Designs --- p.96 / Chapter 5.2.1 --- General Contrasts between an Open and Semi-enclosed Street --- p.97 / Chapter 5.2.2 --- Seasonal Effect on Particulate Pollution in Jardine's Crescent and in Its Control Street --- p.97 / Chapter 5.2.3 --- Climatic Effects on Particulate Pollution --- p.101 / Chapter 5.2.4 --- Effects of Traffic Conditions on Particulate Pollution Pattern in Jardine's Crescent and in Its Control Street --- p.102 / Chapter 5.2.5 --- Effects of Day of the Week on Particulate Pollution --- p.104 / Chapter 5.3 --- The Variation of Particulate Pollution in Causeway Bay --- p.105 / Chapter 5.3.1 --- Spatial Variation --- p.105 / Chapter 5.3.2 --- Seasonal Variation --- p.108 / Chapter 5.3.3 --- Rain as a Cleaning Agent --- p.111 / Chapter 5.4 --- Summary and Conclusion --- p.112 / Chapter Chapter Six --- Pedestrianization and Perception of Air Quality --- p.113 / Chapter 6.1 --- Introduction --- p.113 / Chapter 6.2 --- Effect of Pedestrianization in Improving the Perceived Air Quality --- p.115 / Chapter 6.2.1 --- Overall Changes of PAQ after Pedestrianization --- p.115 / Chapter 6.2.2 --- Changes in Perceived Air Quality As a Result of Pedestrianization --- p.118 / Chapter 6.2.2.1 --- Correlation between PAQ and AQ --- p.118 / Chapter 6.2.2.2 --- Difference in Dose-Response Relationships before and after Pedestrianization --- p.120 / Chapter 6.2.3 --- Summary of Findings on Human Perception --- p.136 / Chapter 6.3 --- Aspects of Pedestrianization Which Improve Perceived Air Quality --- p.136 / Chapter 6.3.1 --- Behavior Constraint Model --- p.137 / Chapter 6.3.2 --- Environmental Stress Model --- p.139 / Chapter 6.3.3 --- Perception of Air Pollution Through Smell and Vision --- p.141 / Chapter 6.4 --- Summary and Conclusion --- p.144 / Chapter Chapter Seven --- Conclusion --- p.146 / Chapter 7.1 --- Summary of Findings --- p.146 / Chapter 7.1.1 --- Model Simulated Air Pollution Levels in Causeway Bay and Possible Effects of the Government Pedestrianization Scheme --- p.147 / Chapter 7.1.2 --- Changes in the Pattern and Characteristics of Particulate Pollution after Pedestrianization --- p.148 / Chapter 7.1.3 --- Effects of Pedestrianization on Human Perception of Air Quality --- p.149 / Chapter 7.2 --- Discussion of Findings --- p.151 / References --- p.153 / Appendix A --- p.163

Current life cycle assessment tools are often deficient in assisting design for sustainable manufacturing efforts. Integrating an improved assessment method into a decision support framework will provide a means for designers and engineers to better understand the impacts of their decisions. A unit process modeling-based sustainability assessment method is presented to assist design decision making by accounting for and quantifying economic, environmental, and social attributes. A set of these sustainability metrics is defined as a basis for comparison of component design alternatives. The method is demonstrated using two titanium component production alternatives that represent typical design for manufacturing scenarios. The modeling method significantly increases the resolution of sustainable manufacturing metrics over conventional assessment techniques, and is one aspect of the overall decision support framework developed. Additionally, fixed sum importance weighting, weighted sum modeling, and scenario analysis were selected as easily employed and transparent design decision techniques to provide the remaining elements of the framework. The demonstration of the decision support framework for titanium component manufacturing illustrates that the sequential approach developed can assist engineers in developing more sustainable components and products. / Graduation date: 2012

Interest in accounting for environmental impacts of products, processes, and systems during the design phase is increasing. Numerous studies have undertaken investigations for reducing environmental impacts across the product life cycle. Efforts have also been launched to quantify such impacts more accurately. Life cycle energy consumption and carbon footprint are among the most frequently adopted and investigated environmental performance metrics. As efforts continue to incorporate environmental sustainability into product design, struggles persist in concurrent consideration of environmental impacts resulting from the manufacturing processes and supply chain network design. Thus, the objective of this research is to present a framework for reducing product cradle-to-gate energy consumption and carbon footprint through simultaneous consideration of manufacturing processes and supply chain activities. The framework developed in this thesis relies on unit process modeling, and is demonstrated for production of a bicycle pedal. It is shown that simultaneous consideration of manufacturing and supply chain processes can impact decision-making and improve product environmental sustainability at the design stage. The work presented contributes to the state of the science in sustainable design and manufacturing research. In addition, a point of departure is established for the research community to move current efforts forward for concurrent consideration of multiple stages of the product life cycle in pursuit of environmental, economic, and social sustainability. / Graduation date: 2012

Capes / Existem diversas formas de se conduzir um Processo de Desenvolvimento de Produtos (PDP), todas com o mesmo objetivo: organizar as atividades e o fluxo de informação. Complementarmente, o desafio em desenvolver produtos sustentáveis é cada vez maior, à medida em que os recursos naturais vão se esgotando. Neste contexto, surge a Avaliação de Ciclo de Vida (ACV), um método que visa mapear todas as etapas que envolvem um produto, desde a fabricação até o fim de vida ou descarte. Contudo, muitos produtos ainda não são projetados para permitir reaproveitamento. Este trabalho buscou uma alternativa para a avaliação de um PDP a partir do modelo Stage-gate, utilizando-se a abordagem da Toyota chamada Set-based (desenvolvimento de um conjunto de alternativas), na busca de se obter um produto mais sustentável, com a adoção de mais de sessenta estratégias de fim de vida, distribuídas ao longo de cinco estágios de desenvolvimento. O resultado culminou na elaboração de uma ferramenta-protótipo a ser utilizada por projetistas. Um desenvolvimento hipotético foi conduzido para a verificação da utilidade desta ferramenta e, ao final do processo, uma ACV foi realizada como forma de verificar a eficiência da ferramenta em atingir o objetivo inicial, estabelecendo-se uma comparação entre um banco existente e as alternativas resultantes do desenvolvimento utilizando a ferramenta, onde pode-se verificar uma melhor performance ambiental principalmente com relação ao destino final dos componentes. Algumas melhorias na utilização do SimaPRO e na melhoria da sistemática proposta também estão apontadas nas conclusões. / There are several methods to manage a Product Development Process, all with the same purpose: to organize the activities and information flow. Among these methods, Stage-Gate appears to be one of the most adopted. In the other hand, the challenge to develop sustainable products grows bigger as resources grow smaller and Lifecycle Assessment arises to evaluate all phases of a product, from manufacture to disposal. Many products nevertheless are designed without consider its posterior reuse. This research has aimed at a way to evaluate environmental impact of a product’s end-of-life during a PDP, using a Stage-gate model improved with the insertion of Toyota’s Set-based approach and more than sixty end-of-life strategies, distributed over development stages. The result was the preliminary prototype of a tool, to be used by product designers. A case study was carried out to test the effectiveness of the proposed tool where, in the end of the development process, a Lifecycle Assessment is performed to an actual seat and the resulting seat alternatives. It was possible to verify improvements in the environmental performance mainly in product’s end-of-life destination, which was the target of this research. Also, improvements are highlighted concerning SimaPRO’s interface and the tool itself.

Capes / Existem diversas formas de se conduzir um Processo de Desenvolvimento de Produtos (PDP), todas com o mesmo objetivo: organizar as atividades e o fluxo de informação. Complementarmente, o desafio em desenvolver produtos sustentáveis é cada vez maior, à medida em que os recursos naturais vão se esgotando. Neste contexto, surge a Avaliação de Ciclo de Vida (ACV), um método que visa mapear todas as etapas que envolvem um produto, desde a fabricação até o fim de vida ou descarte. Contudo, muitos produtos ainda não são projetados para permitir reaproveitamento. Este trabalho buscou uma alternativa para a avaliação de um PDP a partir do modelo Stage-gate, utilizando-se a abordagem da Toyota chamada Set-based (desenvolvimento de um conjunto de alternativas), na busca de se obter um produto mais sustentável, com a adoção de mais de sessenta estratégias de fim de vida, distribuídas ao longo de cinco estágios de desenvolvimento. O resultado culminou na elaboração de uma ferramenta-protótipo a ser utilizada por projetistas. Um desenvolvimento hipotético foi conduzido para a verificação da utilidade desta ferramenta e, ao final do processo, uma ACV foi realizada como forma de verificar a eficiência da ferramenta em atingir o objetivo inicial, estabelecendo-se uma comparação entre um banco existente e as alternativas resultantes do desenvolvimento utilizando a ferramenta, onde pode-se verificar uma melhor performance ambiental principalmente com relação ao destino final dos componentes. Algumas melhorias na utilização do SimaPRO e na melhoria da sistemática proposta também estão apontadas nas conclusões. / There are several methods to manage a Product Development Process, all with the same purpose: to organize the activities and information flow. Among these methods, Stage-Gate appears to be one of the most adopted. In the other hand, the challenge to develop sustainable products grows bigger as resources grow smaller and Lifecycle Assessment arises to evaluate all phases of a product, from manufacture to disposal. Many products nevertheless are designed without consider its posterior reuse. This research has aimed at a way to evaluate environmental impact of a product’s end-of-life during a PDP, using a Stage-gate model improved with the insertion of Toyota’s Set-based approach and more than sixty end-of-life strategies, distributed over development stages. The result was the preliminary prototype of a tool, to be used by product designers. A case study was carried out to test the effectiveness of the proposed tool where, in the end of the development process, a Lifecycle Assessment is performed to an actual seat and the resulting seat alternatives. It was possible to verify improvements in the environmental performance mainly in product’s end-of-life destination, which was the target of this research. Also, improvements are highlighted concerning SimaPRO’s interface and the tool itself.

As empresas de manufatura necessitam integrar seus processos internos digitalmente para se tornarem mais competitivas e entregarem produtos com maior qualidade ao mercado consumidor. Informações definidas nas primeiras etapas de projeto precisam ser recuperadas em todas as fases do ciclo de vida de um produto. Para alcançar este objetivo são necessários modelos de informação que incorporem inteligência e permitam a representação do mundo real. Por outro lado, fabricantes de produtos eletroeletrônicos precisam cumprir requisitos ambientais presentes em marcos regulatórios, como a Diretiva RoHS, para poderem vender seus equipamentos em diversos países. O presente trabalho propõe a aplicação de modelos semânticos para ajudar as empresas a cumprir os requisitos estabelecidos pela Diretiva RoHS. O modelo, criado usando uma ontologia de referência, estabelece relações semânticas entre entidades que representam fases do ciclo de vida do produto, estruturas de produtos e objetos de negócios. Processos de negócio modelados permitem identificar fluxos de informação, bem como atividades que estão ligadas aos requisitos RoHS, percebidas por meio da geração de relatórios disponíveis no framework denominado Projeto Essential. O modelo semântico resultante é, portanto, útil para converter as necessidades relacionadas com o meio ambiente, endereçando requisitos através de um processo de desenvolvimento de produtos que aborda a diretiva RoHS. Um produto eletroeletrônico fabricado por indústrias nacionais foi selecionado para demonstrar a viabilidade da solução proposta. / Manufacturing companies need to integrate their internal processes digitally to become more competitive and deliver higher quality products to the consumer market. Information defined at early design stages needs to be recovered at all stages of the life cycle of a product. To accomplish this, information models that incorporate intelligence and enable the representation of the real world are necessary. On the other hand, electronic products manufacturers need to comply with environmental requirements present in regulatory frameworks as the RoHS Directive in order to offer their products in several countries. The present work proposes the application of semantic models for helping companies meet the requirements established by the RoHS Directive. A model, created using a reference ontology, establishes semantic relationships between entities that represent product lifecycle stages, product structure and business objects. Business processes, modeled in the form of activity and information flows, are linked to RoHS requirements that can be viewed through the reports in the Essential Project open source framework. The resulting semantic model is, therefore, useful for converting environment-related needs to design requirements through a product development process that addresses the RoHS Directive. A consumer electronics product has been selected for demonstrating the feasibility of the proposed solution.

As empresas de manufatura necessitam integrar seus processos internos digitalmente para se tornarem mais competitivas e entregarem produtos com maior qualidade ao mercado consumidor. Informações definidas nas primeiras etapas de projeto precisam ser recuperadas em todas as fases do ciclo de vida de um produto. Para alcançar este objetivo são necessários modelos de informação que incorporem inteligência e permitam a representação do mundo real. Por outro lado, fabricantes de produtos eletroeletrônicos precisam cumprir requisitos ambientais presentes em marcos regulatórios, como a Diretiva RoHS, para poderem vender seus equipamentos em diversos países. O presente trabalho propõe a aplicação de modelos semânticos para ajudar as empresas a cumprir os requisitos estabelecidos pela Diretiva RoHS. O modelo, criado usando uma ontologia de referência, estabelece relações semânticas entre entidades que representam fases do ciclo de vida do produto, estruturas de produtos e objetos de negócios. Processos de negócio modelados permitem identificar fluxos de informação, bem como atividades que estão ligadas aos requisitos RoHS, percebidas por meio da geração de relatórios disponíveis no framework denominado Projeto Essential. O modelo semântico resultante é, portanto, útil para converter as necessidades relacionadas com o meio ambiente, endereçando requisitos através de um processo de desenvolvimento de produtos que aborda a diretiva RoHS. Um produto eletroeletrônico fabricado por indústrias nacionais foi selecionado para demonstrar a viabilidade da solução proposta. / Manufacturing companies need to integrate their internal processes digitally to become more competitive and deliver higher quality products to the consumer market. Information defined at early design stages needs to be recovered at all stages of the life cycle of a product. To accomplish this, information models that incorporate intelligence and enable the representation of the real world are necessary. On the other hand, electronic products manufacturers need to comply with environmental requirements present in regulatory frameworks as the RoHS Directive in order to offer their products in several countries. The present work proposes the application of semantic models for helping companies meet the requirements established by the RoHS Directive. A model, created using a reference ontology, establishes semantic relationships between entities that represent product lifecycle stages, product structure and business objects. Business processes, modeled in the form of activity and information flows, are linked to RoHS requirements that can be viewed through the reports in the Essential Project open source framework. The resulting semantic model is, therefore, useful for converting environment-related needs to design requirements through a product development process that addresses the RoHS Directive. A consumer electronics product has been selected for demonstrating the feasibility of the proposed solution.