cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.5669062.v1
title: BIM design coordination rooms: proposal of an assessment method

description: Abstract Building Information Modeling (BIM) focuses on a tridimensional model that contains all the information of a traditional 2D documentation, among others, in a format able to be processed by a computer in a more useful way. BIM design coordination has many advantages compared to those based on 2D CAD. However, considering the drastic change in the design representation, there is a need for modifications in the physical infrastructure of coordination meeting rooms to reach all the potential benefits of BIM. This research aims to develop a method for evaluating BIM coordination rooms. Ten criteria and metrics for evaluating the quality of the layout of BIM coordination rooms were proposed. To establish the relative importance among all the proposed criteria, the AHP method of multi-criteria decision based on pair comparisons analysis was adopted. To validate the results, fourteen different layouts for the same room were analysed and evaluated. The proposed method was considered coherent as an evaluation strategy and, therefore the best alternatives could be identified. The criteria and metrics presented are useful for designing or adapting spaces for meeting the needs of BIM-based design coordination room users.
DOI: 10.6084/m9.figshare.20026923.v1
title: A model for forming partnerships in the construction industry

description: Abstract The objective of this article is to formulate an evaluation model to measure the effectiveness of a construction company relationship in creating partnerships with the supply chain of the construction industry. A survey was conducted with 100 Brazilian companies (50 suppliers and 50 construction companies) and the collected data was analysed using multivariate techniques such as cluster, factorial analysis, Spearman correlation and linear regression. Through the creation of an efficiency index composed of three determining factors (trust, long-term relationship and information sharing), the model developed in this study explains the characteristics of interorganisational relationships in the sample studied. Hence, this model serves as a guideline for the adoption of strategies to form partnerships between builders and suppliers. To improve the efficiency of the relationship between construction companies and suppliers, the following key processes should be considered when adopting partnership strategies: supplier selection, performance assessment and joint meetings.
DOI: 10.6084/m9.figshare.20026923
title: A model for forming partnerships in the construction industry

description: Abstract The objective of this article is to formulate an evaluation model to measure the effectiveness of a construction company relationship in creating partnerships with the supply chain of the construction industry. A survey was conducted with 100 Brazilian companies (50 suppliers and 50 construction companies) and the collected data was analysed using multivariate techniques such as cluster, factorial analysis, Spearman correlation and linear regression. Through the creation of an efficiency index composed of three determining factors (trust, long-term relationship and information sharing), the model developed in this study explains the characteristics of interorganisational relationships in the sample studied. Hence, this model serves as a guideline for the adoption of strategies to form partnerships between builders and suppliers. To improve the efficiency of the relationship between construction companies and suppliers, the following key processes should be considered when adopting partnership strategies: supplier selection, performance assessment and joint meetings.
DOI: 10.6084/m9.figshare.20026924
title: Causes of variability in the execution time of processes in different construction systems

description: Abstract One of the major challenges faced by construction management is the implementation of activities within schedule, as variability often occurs. This research study aims to analyse the causes of variability in the execution time of processes in different construction systems, classifying them into different risk levels. The methodology consisted of a field study, where a questionnaire with 31 causes of variability divided into categories was applied to several construction workers. Our aim was to detect the frequency and intensity of delays. The study analysed reinforced concrete works (conventional), structural masonry and concrete walls cast on-site. For the data analysis, a delay factor was created and we classified the causes into risk levels by using cluster analysis. The results showed the main causes of variability for each one of the systems, and pointed to similarities: rework, low quality of work, socialisation. Statistical analyses showed differences between systems: the more industrialised systems had a greater number of causes classified at high-risk levels, but the impact of variability in the process was smaller. The study also showed deficiencies, on the part of managers, to deal with the impacts of process variability.
DOI: 10.6084/m9.figshare.20026924.v1
title: Causes of variability in the execution time of processes in different construction systems

description: Abstract One of the major challenges faced by construction management is the implementation of activities within schedule, as variability often occurs. This research study aims to analyse the causes of variability in the execution time of processes in different construction systems, classifying them into different risk levels. The methodology consisted of a field study, where a questionnaire with 31 causes of variability divided into categories was applied to several construction workers. Our aim was to detect the frequency and intensity of delays. The study analysed reinforced concrete works (conventional), structural masonry and concrete walls cast on-site. For the data analysis, a delay factor was created and we classified the causes into risk levels by using cluster analysis. The results showed the main causes of variability for each one of the systems, and pointed to similarities: rework, low quality of work, socialisation. Statistical analyses showed differences between systems: the more industrialised systems had a greater number of causes classified at high-risk levels, but the impact of variability in the process was smaller. The study also showed deficiencies, on the part of managers, to deal with the impacts of process variability.
DOI: 10.6084/m9.figshare.5718865
title: The relationship between lean construction and sustainability

description: Abstract Lean thinking and sustainability applied to construction are aimed, respectively, at mitigating waste and reducing the negative impacts of the sector. Recent studies claim that the joint application of the two concepts can generate interactions and synergies. This study aims to identify how lean construction and sustainability relate to each other, as well as to describe this relationship through its synergistic points, negative interactions and other relevant knowledge. For this purpose, the method of systematic literature review was adopted, resulting in the selection of 59 articles for bibliometric and qualitative analysis. The articles were grouped and classified into 6 study foci. The bibliometric results indicate that the theme has gained importance in the last five years, with the United States and Brazil as major contributors. The qualitative analysis indicates that the relationship between the approaches is synergic, mainly from lean construction to sustainability, and that the relationship can be strengthened by the alignment of the concepts of value and waste. The conclusion of the study is that, although there are already cases of integration of practices and tools, there is still need for studies to deepen the knowledge on the subject.
DOI: 10.6084/m9.figshare.5718865.v1
title: The relationship between lean construction and sustainability

description: Abstract Lean thinking and sustainability applied to construction are aimed, respectively, at mitigating waste and reducing the negative impacts of the sector. Recent studies claim that the joint application of the two concepts can generate interactions and synergies. This study aims to identify how lean construction and sustainability relate to each other, as well as to describe this relationship through its synergistic points, negative interactions and other relevant knowledge. For this purpose, the method of systematic literature review was adopted, resulting in the selection of 59 articles for bibliometric and qualitative analysis. The articles were grouped and classified into 6 study foci. The bibliometric results indicate that the theme has gained importance in the last five years, with the United States and Brazil as major contributors. The qualitative analysis indicates that the relationship between the approaches is synergic, mainly from lean construction to sustainability, and that the relationship can be strengthened by the alignment of the concepts of value and waste. The conclusion of the study is that, although there are already cases of integration of practices and tools, there is still need for studies to deepen the knowledge on the subject.
DOI: 10.6084/m9.figshare.5719114
title: Design guidelines for reducing waste in the production of low-income housing with prefabricated wall panels in dry building systems

description: Abstract Managers in the construction sector are being urged to reduce the housing deficit in the low-income segment. The use of industrialised building systems is an alternative for achieving this aim and for the implementation of mass customization. However, the possibility of conferring some degree of customisation in housing may have negative impacts on production. Product modularity is a mass customisation approach, by designing modules that can be combined to provide product variety. The aim of this paper is to propose design guidelines to reduce waste in the production of prefabricated wall panels in dry construction systems, focusing on simplifying the production of customised social housing. The methodological approach adopted was design science research. The research started with a literature review to understand the concepts of Product Architecture and Modularity. Based on the results, we proposed design guidelines applying the principles of product modularity. The effect of the guidelines on the production process of the panels was evaluated through data collection at the factory. The adoption of product modularity in house-building design proved to be an efficient approach for the standardisation of components and for simplifying the mass production process of the wall panels.
DOI: 10.6084/m9.figshare.5719114.v1
title: Design guidelines for reducing waste in the production of low-income housing with prefabricated wall panels in dry building systems

description: Abstract Managers in the construction sector are being urged to reduce the housing deficit in the low-income segment. The use of industrialised building systems is an alternative for achieving this aim and for the implementation of mass customization. However, the possibility of conferring some degree of customisation in housing may have negative impacts on production. Product modularity is a mass customisation approach, by designing modules that can be combined to provide product variety. The aim of this paper is to propose design guidelines to reduce waste in the production of prefabricated wall panels in dry construction systems, focusing on simplifying the production of customised social housing. The methodological approach adopted was design science research. The research started with a literature review to understand the concepts of Product Architecture and Modularity. Based on the results, we proposed design guidelines applying the principles of product modularity. The effect of the guidelines on the production process of the panels was evaluated through data collection at the factory. The adoption of product modularity in house-building design proved to be an efficient approach for the standardisation of components and for simplifying the mass production process of the wall panels.
DOI: 10.6084/m9.figshare.5719183.v1
title: Co-design support methods and tools in the building design process

description: Abstract The effective involvement of users in the design process brings several benefits to the process, including capturing users' real needs and legitimising design decisions. However, methods and tools to enable co-design are still incipient, which hinders the dissemination of this approach. The aim of this study was to search for methods and tools already employed in co-design with users, through a literature review and case studies in architectural design companies. The results highlight the importance of methods and tools, and that the main methodological issue in co-design is to promote a common language in the design, so that both users and design professionals can understand and express themselves. They also highlight that co-design is important in the initial stages of the design process, where the methods and tools are used. This study contributes to enriching the available literature on the subject and to disseminating it among architects, designers and researchers, facilitating communication between users and the professional team in the design process, thus improving the quality of the process and the designed building.
DOI: 10.6084/m9.figshare.5719183
title: Co-design support methods and tools in the building design process

description: Abstract The effective involvement of users in the design process brings several benefits to the process, including capturing users' real needs and legitimising design decisions. However, methods and tools to enable co-design are still incipient, which hinders the dissemination of this approach. The aim of this study was to search for methods and tools already employed in co-design with users, through a literature review and case studies in architectural design companies. The results highlight the importance of methods and tools, and that the main methodological issue in co-design is to promote a common language in the design, so that both users and design professionals can understand and express themselves. They also highlight that co-design is important in the initial stages of the design process, where the methods and tools are used. This study contributes to enriching the available literature on the subject and to disseminating it among architects, designers and researchers, facilitating communication between users and the professional team in the design process, thus improving the quality of the process and the designed building.
DOI: 10.7916/d8-5hp4-p287
title:  GRID3 Nigeria Settlement Extents, Version 01

description: NOTE: This version of the Nigeria settlement extents has been superseded by "GRID3 Nigeria Settlement Extents, Version 01.01", now available here: https://doi.org/10.7916/d8-mb4j-1p68 The dataset consists of settlement extents across Nigeria, as well as accompanying population estimates for each settlement extent. This data product contains all information contained in the previous GRID3 Nigeria Settlement Extents, Version 01 Alpha product, with updates. Updates in this version include: a single settlement extent feature class (Alpha contained the same data in three (3) separate feature class layers: BUAs, SSAs & Hamlets), and new population estimate fields ("Population" and "Pop_UN_adj") for each settlement extent . This work has been undertaken as part of the Geo-Referenced Infrastructure and Demographic Data for Development (GRID3) programme. GRID3 works with countries to generate, validate and use geospatial data on population, settlements, infrastructure, and subnational boundaries. For more information, see https://grid3.org/ Keywords: Settlements, Hamlets, Built-up Areas (BUA), Small Settlement Areas (SSA) The programme is funded by the Bill & Melinda Gates Foundation and United Kingdom's Foreign, Commonwealth, Development Office. It is implemented by Flowminder Foundation, WorldPop at the University of Southampton, the United Nations Population Fund (UNFPA), and the Center for International Earth Science Information Network (CIESIN) at Columbia University.
DOI: 10.6084/m9.figshare.5719771
title: 4D BIM applied to logistics management: implementation in the assembly of Engineer-to-order prefabricated concrete systems

description: Abstract The management of prefabricated building systems demands an intense exchange of information between the the plant and the construction site, in order to synchronize the production of components, logistic operations and site assembly, especially in engineer-to-order environments, in which the degree of uncertainty tends to be high. The literature suggests the use of Building Information Modeling (BIM) to facilitate the sharing of information and to support decision-making in this type of environment, as well as the application of Lean Production concepts and principles. Particularly in relation to the assembly process, 4D BIM can be used to simulate some operations, supporting production planning and control. This paper proposes a set of guidelines for using 4D BIM and Lean Production concepts and principles to support logistics management for the assembly process in engineer-to-order concrete prefabricated systems. Design Science Research was the methodological approach adopted in this investigation, which was based on an empirical study carried out in a company that delivers prefabricated concrete structures. The main contributions of this study are related to the use of BIM 4D for standardizing logistics operations, and for managing information related to system status
DOI: 10.6084/m9.figshare.5719771.v1
title: 4D BIM applied to logistics management: implementation in the assembly of Engineer-to-order prefabricated concrete systems

description: Abstract The management of prefabricated building systems demands an intense exchange of information between the the plant and the construction site, in order to synchronize the production of components, logistic operations and site assembly, especially in engineer-to-order environments, in which the degree of uncertainty tends to be high. The literature suggests the use of Building Information Modeling (BIM) to facilitate the sharing of information and to support decision-making in this type of environment, as well as the application of Lean Production concepts and principles. Particularly in relation to the assembly process, 4D BIM can be used to simulate some operations, supporting production planning and control. This paper proposes a set of guidelines for using 4D BIM and Lean Production concepts and principles to support logistics management for the assembly process in engineer-to-order concrete prefabricated systems. Design Science Research was the methodological approach adopted in this investigation, which was based on an empirical study carried out in a company that delivers prefabricated concrete structures. The main contributions of this study are related to the use of BIM 4D for standardizing logistics operations, and for managing information related to system status
DOI: 10.6084/m9.figshare.5719780
title: Parametric model of reinforced concrete frames with optimized sizing: a proposal of a design tool for the early stages of the structural design

description: Abstract Commonly, the conception of the structural system and its preliminary design should take place in the early design stages of a building's architectural form. Traditionally, studies suggest pre-sizing rules given by the relation between the cross-section dimensions and span lengths. In order to assist in this process, this paper proposes the prototype of a structural parametric design tool for a three-dimensional reinforced concrete rigid frame structure, composed by beams, columns and flat slabs. The input data that can be manipulated by the user of this tool are the overall dimensions of the structure, the characteristic strength of the concrete, the columns' reinforcement ratio, the floor system displacement limit, the load values on slabs and beams and the cross-section dimensions of the members. The solutions of this system were obtained using a Genetic Algorithm coupled to the proposed one. The product obtained is a geometric model if the structure with its sizes viewed on the CAD viewport in real time, updated as the changes in the input data occur. The performance of this tool was compared with previous proposals and we conducted a critical analysis of the possibility of its use to assist trans-disciplinary work in building design.
DOI: 10.6084/m9.figshare.5719780.v1
title: Parametric model of reinforced concrete frames with optimized sizing: a proposal of a design tool for the early stages of the structural design

description: Abstract Commonly, the conception of the structural system and its preliminary design should take place in the early design stages of a building's architectural form. Traditionally, studies suggest pre-sizing rules given by the relation between the cross-section dimensions and span lengths. In order to assist in this process, this paper proposes the prototype of a structural parametric design tool for a three-dimensional reinforced concrete rigid frame structure, composed by beams, columns and flat slabs. The input data that can be manipulated by the user of this tool are the overall dimensions of the structure, the characteristic strength of the concrete, the columns' reinforcement ratio, the floor system displacement limit, the load values on slabs and beams and the cross-section dimensions of the members. The solutions of this system were obtained using a Genetic Algorithm coupled to the proposed one. The product obtained is a geometric model if the structure with its sizes viewed on the CAD viewport in real time, updated as the changes in the input data occur. The performance of this tool was compared with previous proposals and we conducted a critical analysis of the possibility of its use to assist trans-disciplinary work in building design.
DOI: 10.6084/m9.figshare.5720731
title: Degradation of rendering mortars made with fine concrete aggregates by thermal cycles

description: Abstract This study evaluates the loss of the properties of rendering mortars with recycled fine aggregate submitted to thermal cycling tests based on the NBR 15575-4 (ABNT, 2013) standard. The mortars were produced at a mix-proportion of 1:1:6 in volume (cement, lime and sand) using Brazilian cement CP II F-32, CH-I lime putty, river sand and fine aggregate produced from recycled concrete, in compositions with 2, 4.5, 7 and 9.5% relatively to the mass of sand. The rendering mortars were applied on ceramic substrate and evaluated, at 28 days of age, for bond tensile strength (NBR 13528 (ABNT, 2010)), surface hardness determined by Shore durometer type D (ASTM D 2240-5 (AMERICAN..., 2005)) and the velocity of ultrasound waves. The systems formed by the rendering mortars applied on the ceramic substrate were subjected to accelerated ageing by exposure to thermal cycling, which degraded the mortars. All rendering mortars presented superficial hardness decline (in the order of 10%), lowered velocity of ultrasound waves (about 25%) and lowered bond tensile strength by about 15%. The evaluation of the rupture of the rendering mortars showed that those with 2 e 4.5% fine aggregate content suffered the greater degradation.