Pub Date : 2021-12-02DOI: 10.5130/ajceb.v21i4.7738
C. Langston, Charles Crowley
Since the COVID-19 pandemic began, there has been increased reliance on new infrastructure projects to counter economic fallout and underpin employment security. Urban and inter-urban transportation projects, such as major road, rail and port facilities, are popular choices for national and state governments in Australia as they provide broad fiscal support across all sectors of the economy. The problem with stimulus is making sure that the quality of the new infrastructure provides collective utility to a community or region. Whether the benefits will be worthwhile and represent best use of resource inputs requires financial, social, ethical and environmental consequences to be evaluated in a comparable format. The aim in this paper is to analyse the Gold Coast Light Rail (GCLR) Stage 1&2 project using a method that is capable of merging tangible and intangible criteria using an ordinal ranking algorithm. While the GCLR case study is undertaken with the benefit of hindsight, normally these types of evaluations are performed in real time as a project progresses from initiation (design) to implementation (deliver) and influence (delight). The method adopted in this study represents a modern form of multi-criteria decision-making, which enables successful projects to be distinguished from unsuccessful ones using a time period from commencement until one full year of operation has occurred. The i3d3 model, developed by a team from Bond University, has the unique benefit of ranking projects from best to worst across an organisational portfolio, geographic region or industry sector. It also supports past project performance to inform new design through application of a continuous improvement process of recording lessons learned. The GCLR case study calculated 100% of the critical success factors in the model to be positive and produced an overall success ranking of 23 (on a scale of -100 to +100). This paper presents the approach taken to evaluate GCLR’s level of success and the calculations that took place to reach this finding. This is the first time i3d3 has been used on an Australian project.
{"title":"Evaluation of Transportation Infrastructure: A Case Study of Gold Coast Light Rail Stage 1&2","authors":"C. Langston, Charles Crowley","doi":"10.5130/ajceb.v21i4.7738","DOIUrl":"https://doi.org/10.5130/ajceb.v21i4.7738","url":null,"abstract":"Since the COVID-19 pandemic began, there has been increased reliance on new infrastructure projects to counter economic fallout and underpin employment security. Urban and inter-urban transportation projects, such as major road, rail and port facilities, are popular choices for national and state governments in Australia as they provide broad fiscal support across all sectors of the economy. The problem with stimulus is making sure that the quality of the new infrastructure provides collective utility to a community or region. Whether the benefits will be worthwhile and represent best use of resource inputs requires financial, social, ethical and environmental consequences to be evaluated in a comparable format. The aim in this paper is to analyse the Gold Coast Light Rail (GCLR) Stage 1&2 project using a method that is capable of merging tangible and intangible criteria using an ordinal ranking algorithm. While the GCLR case study is undertaken with the benefit of hindsight, normally these types of evaluations are performed in real time as a project progresses from initiation (design) to implementation (deliver) and influence (delight). The method adopted in this study represents a modern form of multi-criteria decision-making, which enables successful projects to be distinguished from unsuccessful ones using a time period from commencement until one full year of operation has occurred. The i3d3 model, developed by a team from Bond University, has the unique benefit of ranking projects from best to worst across an organisational portfolio, geographic region or industry sector. It also supports past project performance to inform new design through application of a continuous improvement process of recording lessons learned. The GCLR case study calculated 100% of the critical success factors in the model to be positive and produced an overall success ranking of 23 (on a scale of -100 to +100). This paper presents the approach taken to evaluate GCLR’s level of success and the calculations that took place to reach this finding. This is the first time i3d3 has been used on an Australian project.","PeriodicalId":51729,"journal":{"name":"Construction Economics and Building","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2021-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86918252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-08-21DOI: 10.5130/ajceb.v21i3.7854
Saad Sarhan, S. Pretlove
Only rapid and drastic reductions in greenhouse gases can prevent ever more widespread devastation and extreme weather events. Every increment in global heating is likely to compound the accelerating effects, according to the International Panel on Climate Change (IPCC), the world’s leading authority on climate science (IPCC, 2021). The aim of this special issue is to boost sustainable performance improvements in the construction sector, through raising discussions on advances and future directions of lean and sustainable construction theories and practices. The construction sector is known to be one of the largest environmental polluters, physical waste producers, and energy consumers throughout its lifecycle. The global construction market was forecast to grow by up to 70% between 2013 and 2025 (HM Government, 2013). The existing built environment is subject to growing global challenges, including decarbonising heating and cooling as well as the construction process, rapid population growth, anthropogenic climate changes and resource scarcity. The Covid-19 crisis further compounds these challenges by creating additional unprecedented social and economic pressures on the sector. This means that sustainability must become an integral part of our day-to-day practice, not an add-on. It is imperative that development, design, and construction professionals consider whole-life costs throughout the life of our built environment. There is significant evidence that integrating approaches to lean and sustainable construction can yield substantial benefits to the sector, and that the resulting synergy from combining the two approaches can fulfil the distinct objectives of each. The papers in this special issue are only a small beginning. Much more work is needed.
{"title":"Lean and Sustainable Construction: State of the Art and Future Directions","authors":"Saad Sarhan, S. Pretlove","doi":"10.5130/ajceb.v21i3.7854","DOIUrl":"https://doi.org/10.5130/ajceb.v21i3.7854","url":null,"abstract":"Only rapid and drastic reductions in greenhouse gases can prevent ever more widespread devastation and extreme weather events. Every increment in global heating is likely to compound the accelerating effects, according to the International Panel on Climate Change (IPCC), the world’s leading authority on climate science (IPCC, 2021). The aim of this special issue is to boost sustainable performance improvements in the construction sector, through raising discussions on advances and future directions of lean and sustainable construction theories and practices. \u0000 \u0000The construction sector is known to be one of the largest environmental polluters, physical waste producers, and energy consumers throughout its lifecycle. The global construction market was forecast to grow by up to 70% between 2013 and 2025 (HM Government, 2013). The existing built environment is subject to growing global challenges, including decarbonising heating and cooling as well as the construction process, rapid population growth, \u0000anthropogenic climate changes and resource scarcity. The Covid-19 crisis further compounds these challenges by creating additional unprecedented social and economic pressures on the sector. This means that sustainability must become an integral part of our day-to-day practice, not an add-on. \u0000 \u0000It is imperative that development, design, and construction professionals consider whole-life costs throughout the life of our built environment. There is significant evidence that integrating approaches to lean and sustainable construction can yield substantial benefits to the sector, and that the resulting synergy from combining the two approaches can fulfil the distinct objectives of each. The papers in this special issue are only a small beginning. Much more work is needed.","PeriodicalId":51729,"journal":{"name":"Construction Economics and Building","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2021-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83017891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-08-15DOI: 10.5130/ajceb.v21i3.7660
Siti Sarah MAT ISA, Nazirah Zainul Abidin
Eco-innovation (EI) is a concept that integrates eco-consciousness within innovation development. While EI has been widely applied in the manufacturing industry, its adoption in the construction sector remains uncertain. The rising concern of environmental impacts on construction necessitates the importance of finding more innovative ways to push environmental needs within the complexity of projects’ design and methods. Contractors hold a strategic position to promote and adopt EI into management, construction, and development. This paper explores 1) the adoption level of EI practices and 2) the relationship between the adoption of EI practices and the factors that drive EI, within the Malaysian contractor firms. A questionnaire survey was developed using 18 EI components and four driving factors. A total of 95 Grade G7 contractor firms responded to the survey. The survey revealed that the level of EI adoption in contractor firms is still at a moderate pace. The results showed that organisational EI is a crucial component that supports the firm’s eco-innovative management approach to improve firm’s environmental performance. The results indicated that all four driving factors have a positive relationship with the implementation of EI. Technology factor was identified as crucial in influencing better adoption of EI in contractor firms. Findings from this study are beneficial to develop a framework on strategies to increase the EI adoption rate among the contractor firms and deepen the understanding of EI implementation at the firm level, further extending to the project site level.
{"title":"Eco-innovation Adoption in Malaysian Contractor Firms: Understanding the Components and Drivers","authors":"Siti Sarah MAT ISA, Nazirah Zainul Abidin","doi":"10.5130/ajceb.v21i3.7660","DOIUrl":"https://doi.org/10.5130/ajceb.v21i3.7660","url":null,"abstract":"Eco-innovation (EI) is a concept that integrates eco-consciousness within innovation development. While EI has been widely applied in the manufacturing industry, its adoption in the construction sector remains uncertain. The rising concern of environmental impacts on construction necessitates the importance of finding more innovative ways to push environmental needs within the complexity of projects’ design and methods. Contractors hold a strategic position to promote and adopt EI into management, construction, and development. This paper explores 1) the adoption level of EI practices and 2) the relationship between the adoption of EI practices and the factors that drive EI, within the Malaysian contractor firms. A questionnaire survey was developed using 18 EI components and four driving factors. A total of 95 Grade G7 contractor firms responded to the survey. The survey revealed that the level of EI adoption in contractor firms is still at a moderate pace. The results showed that organisational EI is a crucial component that supports the firm’s eco-innovative management approach to improve firm’s environmental performance. The results indicated that all four driving factors have a positive relationship with the implementation of EI. Technology factor was identified as crucial in influencing better adoption of EI in contractor firms. Findings from this study are beneficial to develop a framework on strategies to increase the EI adoption rate among the contractor firms and deepen the understanding of EI implementation at the firm level, further extending to the project site level.","PeriodicalId":51729,"journal":{"name":"Construction Economics and Building","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2021-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70712842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-08-15DOI: 10.5130/ajceb.v21i3.7684
Smitha J.S, Albert Thomas
Sustainable development aims at minimising waste and reducing exploitation of natural resources and energy, so that needs of the future generations are taken care of. Circular Economy (CE) is a new drift towards sustainability that aims at minimising waste and promoting material reuse, thereby creating a regenerative system. The construction industry is responsible for the extraction of raw materials and the generation of waste in large quantities, thereby making it an opportune sector for transition to a circular economy. On account of the complex nature of the built environment comprising various phases and associated actors, a proper framework or indexing for the circular economy is missing at present. This study aims to develop an integrated model of CE in the built environment which considers various construction stages and applicable strategies. An index for measuring the circularity potential in construction materials is also proposed, based on attributes developed from literature review and analysis of questionnaire survey. Simple Additive Weighting Method (SAWM), an elementary multi-criteria decision-making method is used for developing the index. It is anticipated that Circular Economy Potential Index (CEPI) would support decision-making in the initial stage of construction projects and help to compare the circularity of materials.
{"title":"Integrated Model and Index for Circular Economy in the Built-Environment in the Indian Context","authors":"Smitha J.S, Albert Thomas","doi":"10.5130/ajceb.v21i3.7684","DOIUrl":"https://doi.org/10.5130/ajceb.v21i3.7684","url":null,"abstract":"Sustainable development aims at minimising waste and reducing exploitation of natural resources and energy, so that needs of the future generations are taken care of. Circular Economy (CE) is a new drift towards sustainability that aims at minimising waste and promoting material reuse, thereby creating a regenerative system. The construction industry is responsible for the extraction of raw materials and the generation of waste in large quantities, thereby making it an opportune sector for transition to a circular economy. On account of the complex nature of the built environment comprising various phases and associated actors, a proper framework or indexing for the circular economy is missing at present. This study aims to develop an integrated model of CE in the built environment which considers various construction stages and applicable strategies. An index for measuring the circularity potential in construction materials is also proposed, based on attributes developed from literature review and analysis of questionnaire survey. Simple Additive Weighting Method (SAWM), an elementary multi-criteria decision-making method is used for developing the index. It is anticipated that Circular Economy Potential Index (CEPI) would support decision-making in the initial stage of construction projects and help to compare the circularity of materials.","PeriodicalId":51729,"journal":{"name":"Construction Economics and Building","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2021-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78843961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-08-15DOI: 10.5130/ajceb.v21i3.7628
Saad Zighan, Moheeb Abualqumboz
The construction industry is well-known for generating the largest amount of waste amongst other industries, which significantly pollutes the environment. This study, therefore, examines the causes and sources of waste in construction projects, considering activities, inputs, and outputs of each phase of the construction projects’ lifecycle (i.e., concept, definition, deployment, and transition). Thirty semi-structured interviews were conducted with professionals in construction projects in Jordan, including architects, contractors, and project administrators. The findings reveal that waste resulting from construction projects passes across several organized operations from generation to final disposal. Furthermore, waste is generated in small amounts at the early stages of the project construction but grows as the project progresses towards the end. This paper’s key contribution is to supplement the literature on waste management solutions by providing a holistic approach to tackling waste at its root by including waste management strategies across the project lifecycle phases, not only during the construction phase. This is done with a management readiness view to develop a suitable strategy for construction waste minimization and improve the management of construction projects. This study’s practical implication is providing a holistic waste management framework for practitioners to adopt in the early stages of the project.
{"title":"A Project Life-Cycle Readiness Approach to Manage Construction Waste in Jordan","authors":"Saad Zighan, Moheeb Abualqumboz","doi":"10.5130/ajceb.v21i3.7628","DOIUrl":"https://doi.org/10.5130/ajceb.v21i3.7628","url":null,"abstract":"The construction industry is well-known for generating the largest amount of waste amongst other industries, which significantly pollutes the environment. This study, therefore, examines the causes and sources of waste in construction projects, considering activities, inputs, and outputs of each phase of the construction projects’ lifecycle (i.e., concept, definition, deployment, and transition). Thirty semi-structured interviews were conducted with professionals in construction projects in Jordan, including architects, contractors, and project administrators. The findings reveal that waste resulting from construction projects passes across several organized operations from generation to final disposal. Furthermore, waste is generated in small amounts at the early stages of the project construction but grows as the project progresses towards the end. This paper’s key contribution is to supplement the literature on waste management solutions by providing a holistic approach to tackling waste at its root by including waste management strategies across the project lifecycle phases, not only during the construction phase. This is done with a management readiness view to develop a suitable strategy for construction waste minimization and improve the management of construction projects. This study’s practical implication is providing a holistic waste management framework for practitioners to adopt in the early stages of the project.","PeriodicalId":51729,"journal":{"name":"Construction Economics and Building","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2021-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87642622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-08-15DOI: 10.5130/ajceb.v21i3.7642
A. Stefańska, Marta Cygan, Kinga Batte, J. Pietrzak
Digital fabrication leads architects and structural engineers to modify the design optimisation methodology. The designers, as never before, are facing new technologies developed in the search for new materials based, among others, on wood components and the improvement of manufacturing methods at the same time. In this process, the material and manufacturing technology adjustment to desired aesthetic outcomes is possible not only by the material used but also by the self-organisation of the structure's optimisation. New fabrication techniques linked with topology optimising software change traditional load-bearing systems designing using timber and wood-based materials. Multi-objective optimisation research indicates that timber might be a comprehensive material based on various applications from low-tech to cutting-edge contemporary fabrication technologies. The article presents new tools and methods for the optimisation of structural elements. A case study based on interdisciplinary architectural and structural optimisation suggests the possible effective research-based design. Comparing contemporary buildings with wood load-bearing structures explains timber usage's diversity and characteristics in modern design.
{"title":"Application of Timber and Wood-based Materials in Architectural Design using Multi-objective Optimisation Tools","authors":"A. Stefańska, Marta Cygan, Kinga Batte, J. Pietrzak","doi":"10.5130/ajceb.v21i3.7642","DOIUrl":"https://doi.org/10.5130/ajceb.v21i3.7642","url":null,"abstract":"Digital fabrication leads architects and structural engineers to modify the design optimisation methodology. The designers, as never before, are facing new technologies developed in the search for new materials based, among others, on wood components and the improvement of manufacturing methods at the same time. In this process, the material and manufacturing technology adjustment to desired aesthetic outcomes is possible not only by the material used but also by the self-organisation of the structure's optimisation. New fabrication techniques linked with topology optimising software change traditional load-bearing systems designing using timber and wood-based materials. Multi-objective optimisation research indicates that timber might be a comprehensive material based on various applications from low-tech to cutting-edge contemporary fabrication technologies. The article presents new tools and methods for the optimisation of structural elements. A case study based on interdisciplinary architectural and structural optimisation suggests the possible effective research-based design. Comparing contemporary buildings with wood load-bearing structures explains timber usage's diversity and characteristics in modern design.","PeriodicalId":51729,"journal":{"name":"Construction Economics and Building","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2021-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82714855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-08-15DOI: 10.5130/ajceb.v21i3.7655
S. Al-Hamadani, T. Egbelakin, W. Sher, J. Meding
The application of ecological modernization (EM) (to delink industry growth from environmental damage) to minimize construction waste has not been explored within the construction industry in general, and the New South Wales (NSW) construction industry in particular. This study seeks to identify the drivers of applying EM to construction waste minimisation (CWM) in the industry. Also, to determine the CWM measures that are critical for each of the drivers. A survey was adopted in this study to target stakeholders engaged in the delivery of construction projects in NSW from design to completion. The survey was selected to reach a large number of respondents within a manageable period. A pilot study was conducted to ensure the reliability of the research design before a full-scale data collection was launched. The data from 240 valid responses was analysed using factor analysis, relative importance index and descriptive statistics. The results revealed five important drivers for EM’s application to CWM. These are agents of change, government policies, supply chain dynamics, skill-building and technological innovations. The CWM measures that are critical for each of these drivers were also identified. The study provides insights into the application of EM to address the construction industry problem of waste generation as by-product of its growth. It also shows the ability to protect the environment while enabling continuous economic growth. Furthermore, it demonstrates the applicability of EM to minimize the construction waste of NSW construction industry.
{"title":"Drivers of Applying Ecological Modernization to Construction Waste Minimization in New South Wales Construction Industry","authors":"S. Al-Hamadani, T. Egbelakin, W. Sher, J. Meding","doi":"10.5130/ajceb.v21i3.7655","DOIUrl":"https://doi.org/10.5130/ajceb.v21i3.7655","url":null,"abstract":"The application of ecological modernization (EM) (to delink industry growth from environmental damage) to minimize construction waste has not been explored within the construction industry in general, and the New South Wales (NSW) construction industry in particular. This study seeks to identify the drivers of applying EM to construction waste minimisation (CWM) in the industry. Also, to determine the CWM measures that are critical for each of the drivers. A survey was adopted in this study to target stakeholders engaged in the delivery of construction projects in NSW from design to completion. The survey was selected to reach a large number of respondents within a manageable period. A pilot study was conducted to ensure the reliability of the research design before a full-scale data collection was launched. The data from 240 valid responses was analysed using factor analysis, relative importance index and descriptive statistics. The results revealed five important drivers for EM’s application to CWM. These are agents of change, government policies, supply chain dynamics, skill-building and technological innovations. The CWM measures that are critical for each of these drivers were also identified. The study provides insights into the application of EM to address the construction industry problem of waste generation as by-product of its growth. It also shows the ability to protect the environment while enabling continuous economic growth. Furthermore, it demonstrates the applicability of EM to minimize the construction waste of NSW construction industry.","PeriodicalId":51729,"journal":{"name":"Construction Economics and Building","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2021-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79922858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-08-15DOI: 10.5130/ajceb.v21i3.7638
A. Mossman, Saad Sarhan
The aim of this study is to explore how offsite fabrication (OSF) can be tightly coupled with production and assembly on-site. Prefabrication is a production method that has potential to yield significant productivity and sustainability improvements in the construction industry. Failure to synchronise production in the factory with on-site production can lead to financial losses for the client/owner, main contractor and subcontractors as well as to delays in the construction schedule. The study draws on two case-studies and the authors’ experiences in the context of a critical review of literature on the concepts of flow and Just-in-time (JIT) construction delivery. The findings show the value of a buffer between suppliers, fabricators and the site as a way to help the whole supply team create production flow and more environmentally friendly results. A buffer can help while the team is learning to use collaborative short-term planning to create predictable production. The paper recommends ways to synchronise OSF with on-site production. The paper provides practitioners with ideas to reduce both work waiting for workers (or robots) and workers (or robots) waiting for work – and it contributes to theory by raising more questions for further research.
{"title":"Synchronising Off-Site Fabrication with On-Site Production in Construction","authors":"A. Mossman, Saad Sarhan","doi":"10.5130/ajceb.v21i3.7638","DOIUrl":"https://doi.org/10.5130/ajceb.v21i3.7638","url":null,"abstract":"The aim of this study is to explore how offsite fabrication (OSF) can be tightly coupled with production and assembly on-site. Prefabrication is a production method that has potential to yield significant productivity and sustainability improvements in the construction industry. Failure to synchronise production in the factory with on-site production can lead to financial losses for the client/owner, main contractor and subcontractors as well as to delays in the construction schedule. The study draws on two case-studies and the authors’ experiences in the context of a critical review of literature on the concepts of flow and Just-in-time (JIT) construction delivery. The findings show the value of a buffer between suppliers, fabricators and the site as a way to help the whole supply team create production flow and more environmentally friendly results. A buffer can help while the team is learning to use collaborative short-term planning to create predictable production. The paper recommends ways to synchronise OSF with on-site production. The paper provides practitioners with ideas to reduce both work waiting for workers (or robots) and workers (or robots) waiting for work – and it contributes to theory by raising more questions for further research.","PeriodicalId":51729,"journal":{"name":"Construction Economics and Building","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2021-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85454051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-08-15DOI: 10.5130/ajceb.v21i3.7681
V. Ahmed, Sara Saboor, Fatima Ahmed Almarzooqi, Hessa Ahmed Alshamsi, Mariam Abdalla Alketbi, Fatema Ahmed Al marei
Sustainability has gained popularity and importance around the globe due to the ever-increasing effects of climate change and global warming on Earth. As of the 21st century, human endeavour has caused an enormous amount of damage to the environmental ecological system. Among which, one of the major contributors to the increase in the environmental issues and CO2 emissions are the conventional sources of energy, especially in the built environment. Globally, the built environment accounts for 12 percent of the world’s drinkable water, 40 percent of energy wastage and 35 percent of scarce natural resources, which in turn produces 40 percent of the total global carbon emission. Among which are educational buildings which tend to be a major contributor (as most of these facilities are old and conventionally built in the mid-1900s) Thus, with the education sector being an essential part of society, it becomes important to determine the energy performance and carbon footprint of these buildings. The United Arab Emirates (UAE) vision 2021 highlights the country's approach to the importance of providing the best education and adopting sustainable environmental infrastructure. Therefore, this study adopts a methodological approach based on semi-structured interviews and surveys, in order to compare the energy performance of three educational buildings within Higher Education establishments in the UAE as a case study. The study also evaluates the end user’s awareness of the importance of sustainable practices in the buildings and their preference for these buildings. The findings of this study conclude that Net Zero Energy Buildings (NZEBs) are the most efficient buildings in terms of energy performance, carbon consumption and heat generated. Therefore, it is important that the integration of these types of buildings is considered in educational establishments.
{"title":"A Comparative Study of Energy Performance in Educational Buildings in the UAE","authors":"V. Ahmed, Sara Saboor, Fatima Ahmed Almarzooqi, Hessa Ahmed Alshamsi, Mariam Abdalla Alketbi, Fatema Ahmed Al marei","doi":"10.5130/ajceb.v21i3.7681","DOIUrl":"https://doi.org/10.5130/ajceb.v21i3.7681","url":null,"abstract":"Sustainability has gained popularity and importance around the globe due to the ever-increasing effects of climate change and global warming on Earth. As of the 21st century, human endeavour has caused an enormous amount of damage to the environmental ecological system. Among which, one of the major contributors to the increase in the environmental issues and CO2 emissions are the conventional sources of energy, especially in the built environment. Globally, the built environment accounts for 12 percent of the world’s drinkable water, 40 percent of energy wastage and 35 percent of scarce natural resources, which in turn produces 40 percent of the total global carbon emission. Among which are educational buildings which tend to be a major contributor (as most of these facilities are old and conventionally built in the mid-1900s) Thus, with the education sector being an essential part of society, it becomes important to determine the energy performance and carbon footprint of these buildings. The United Arab Emirates (UAE) vision 2021 highlights the country's approach to the importance of providing the best education and adopting sustainable environmental infrastructure. Therefore, this study adopts a methodological approach based on semi-structured interviews and surveys, in order to compare the energy performance of three educational buildings within Higher Education establishments in the UAE as a case study. The study also evaluates the end user’s awareness of the importance of sustainable practices in the buildings and their preference for these buildings. The findings of this study conclude that Net Zero Energy Buildings (NZEBs) are the most efficient buildings in terms of energy performance, carbon consumption and heat generated. Therefore, it is important that the integration of these types of buildings is considered in educational establishments.","PeriodicalId":51729,"journal":{"name":"Construction Economics and Building","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2021-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82289983","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-08-15DOI: 10.5130/ajceb.v21i3.7688
S. Wandahl, C. T. Pérez, S. Salling, H. Neve, J. Lerche, S. Petersen
The European Green Deal's Renovation Wave aims to renovate 35 million energy-inefficient buildings to reduce carbon dioxide (CO2) emissions by at least 55% by 2030. Historically, efforts to reduce CO2 emissions focused on Operational Energy (OE) of the finished buildings. However, in recent years the Embodied Energy (EE) of the building’s construction process has gained attention because of its essential role in construction renovations projects. In this context, construction efficiency, and more precisely, workers’ efficiency, is a vital catalyst to achieve the European Union (EU) targets. To identify the impact of Construction Labour Productivity (CLP) on the renovation wave an exploratory case study was adopted as a research strategy. Data from four domestic housing renovation projects were gathered. Three specific research goals are outlined. The first is to demonstrate the effect of the adoption of Lean tools and methods to increase CLP. The second is to quantify the correlation between improved productivity and the EE emissions saved during the construction phase. The third goal is to estimate the effect the higher productivity has on OE emissions. The results show that the adoption of several Lean tools and methods has a potential to improve CLP to 45%. This rate of improvement for the 35 million housing units to be renovated could save 6.9 million tonnes CO2e from EE and 386 million tonnes CO2e from OE. This novelty link between process improvements and reduced energy consumption and emissions can support politicians and infrastructural developers in decision-making for a more sustainable construction industry.
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