There is a large stock of solid-wall homes in the UK with poor thermal insulation and low energy performance.Although the UK government has supported efforts to improve these buildings, the identification of appropriate technical solutions that effectively improve the existing stock remains challenging. This research investigates how four dimensional building information modelling (4D BIM) could improve the retrofit of social housing, specifically that of 'no-fines' solid-wall homes, through the development of what-if scenarios that enable the analysis of alternative solutions considering costs, energy performance and disruption to users. This paper focuses on the use of 4D building information models to evaluate disruption to end users. The results indicate that the development of such models supports a better understanding of the retrofit process on site. It also supports the definition of production plans with as minimal disruption as possible to users while delivering energy-oriented and cost-effective solutions.

Um modelo BIM é uma representação digital de uma edificação, combinando informações tridimensionais e não-geométricas. Uma vez associado com as durações de atividades ou etapas da construção, o modelo resultante (modelo BIM 4D) pode ser utilizado para projetar e planejar sistemas de produção de empreendimentos de construção através da visualização do plano de execução da obra. Em geral, os estudos sobre o uso combinado da modelagem 4D e BIM realizados até este momento tem tido como foco decisões acerca do planejamento de processos construtivos específicos, dedicando pouca atenção quanto à implementação de modelos BIM 4D na gestão de sistemas de produção no contexto organizacional de empresas de construção. O presente trabalho tem como objetivo propor um método para apoiar a gestão de sistemas de produção em empreendimentos de construção através do uso da modelagem BIM 4D para o projeto do sistema de produção e planejamento da produção. Esta pesquisa adota a design science research como modo de produção de conhecimento, envolvendo quatro estudos empíricos em três empresas de construção de edificações residenciais. A principal contribuição da pesquisa consiste no método para uso de BIM 4D na gestão de sistemas de produção em empreendimentos de construção, além da identificação de um conjunto de benefícios que podem ser esperados a partir do uso dos modelos BIM 4D na gestão de sistemas de produção no contexto de empreendimentos de construção.

Lean Design Management (LDM) is a response from the lean construction community to overcome the chaotic design process in the AEC industry. Many tools, processes and methods were adapted to the context of design with limited success. This paper presents the use and adaptation of different lean design tools and processes in two phases of a major infrastructure project in the UK. The lean design implementation occurred in a Joint-Venture (JV) that had been awarded contracts to deliver civil engineering and construction on the project. This paper also compares the results of combined use of adapted last planner in phase 1 and adapted design structure matrix in phase 2, and identifies some of the practical challenges and benefits of the implementation of lean design management.The main contribution of this paper is the contextualisation of different project organisational structures and its influence on the success of the LDM tools implementation. Moreover, a common result for both phases is the enhancement of project communication, collaboration, and transparency of information for planning and control of the project activities. KEYWORDSlean design management, last planner system, design structure matrix.

What are the differences between production system design and work structuring? And between phase scheduling and work structuring? Which lean planning tool is better suited for each one of these design processes: line of balance, takt-time planning or flowline? This paper aims to answer these questions through a comparison and deeper understanding of production design processes, as well as the potential uses of location-based tools for production planning and control in each design effort.The method used is the literature review analyses on main lean terms and tools applied for production system design. With a better comprehension of the terms and tools, it is expected that academics and lean practitioners will be able to apply lean construction in a more aware and sensible manner. The results will also support researcher's decision about the most suitable lean tool to apply in the case studies in different production design processes.

There is no comprehensive understanding of the problems that may impact the performance of the different actors that participate in the design of construction projects. In the absence of clarity about the problems and challenges that may impact the interactions, it is not possible to propose action plans to optimize the performance of the design teams. Therefore, this study proposes to identify the main problems and challenges in the interactions of design teams in building projects. A mixed review method is used to integrate bibliometric reviews, systematic reviews, and social network analysis to build a complete picture of the reviewed topic while highlighting certain key areas to ensure in-depth research. To achieve the objective of this work, the research was divided into three stages: (1) study of interactions in design teams; (2) identification of problems in design team interactions; and (3) study of problems in design team interactions. Through this study, four current major trends of research were identified: (1) Collaboration and BIM; (2) Design teams in the construction industry; (3) Design management; and (4) Collaborative design methodologies and processes. In addition, the most relevant problems or challenges within design team interactions arise in communication, collaboration, coordination, trust, and role identification.