Effects of the Interactions Between LPS and BIM on Workflow in Two Building Design Projects

Variability in design workflow causes delays and undermines the performance of building projects. As lean processes, the Last Planner System (LPS) and Building Information Modeling (BIM) can improve workflow in building projects through features that reduce waste. Since its introduction, BIM has had significant positive influence on workflow in building design projects, but these have been rarely considered in combination with LPS. This paper is part of a postgraduate research focusing on the implementation of LPS weekly work plans in two BIM-based building design projects to achieve better workflow. It reports on the interactions between lean principles of LPS and BIM functionalities in two building design projects that, from the perspective of an interaction matrix developed by Sacks et al. (2010a), promote workflow

Building Information Modelling [BIM] for energy efficiency in housing refurbishments

Building Information modelling offers potential process and delivery improvements throughout the lifecycle of built assets. However, there is limited research in the use of BIM for energy efficiency in housing refurbishments. The UK has over 300,000 solid wall homes with very poor energy efficiency. A BIM based solution for the retrofit of solid wall housing using lean and collaborative improvement techniques will offer a cost effective, comprehensive solution that is less disruptive, reduces waste and increases accuracy, leading to high quality outcomes. The aim of this research is to develop a BIM based protocol supporting development of 'what if' scenarios in housing retrofits for high efficiency thermal improvements, aiming to reduce costs and disruption for users. The paper presents a literature review on the topic and discusses the research method for the research project (S-IMPLER)

The functions of visual management

Visual Management has been evolving and effectively employed in some manufacturing and service organisations for a long time. In order to facilitate a cross-industrial learning process and to advance in detailed research the understanding of how the Visual Management concept may serve in an organisation is necessary. The aim of this paper is to identify Visual Management functions and the theoretical base for the construction industry. A detailed literature review and an analysis of the findings were performed accordingly. The necessity of a holistic approach in order to make more use of the Visual Management process and some research opportunities were identified

Improving design workflow with the Last Planner System: two action research studies

Variability in workflow during the design stage of building projects has been widely acknowledged as a problem related to poor planning and control of design tasks and has been identified as a major cause of delay in building projects. The Last Planner system (LPS) of production planning and control helps to create predictable and reliable workflow by enabling the management of the range of relationships, interfaces and deliverables involved in a project. This paper presents results of implementing LPS in design to minimize variability in workflow within BIM-based building design projects. Action research was used to implement and evaluate the effectiveness of LPS weekly work planning (WWP) to improve workflow during the design development phase of two building design projects. The research was carried out with the collaboration between design practitioners at two building design firms in Florida and the researchers as facilitators. Overall PPC (Percent Plan Complete) measurements suggest that design workflow improved in both projects after WWP was implemented. However, efforts to use BIM in a lean way in the two projects (discussed in detail in an IGLC22 conference paper by the authors of this paper) were believed to be partly responsible for the improvement in design workflow. KEYWORDS Design workflow variability, LPS, BIM

Opportunities and challenges to mass customise low-income housing in Brazil

Mass Customization (MC) stands for the ability to develop high value-added products within short time frames and at relatively low costs. Although this strategy has been successfully applied in several industries, in construction it has been mostly limited to a few companies that produce factory-built and manufactured homes. In Brazil, where traditional construction techniques are majorly adopted in low-income housing programs, there have been many critics regarding the excessive standardization and thus, non-consideration of the increasing diversity of households and their specific needs. Such standardization is mainly due to the use of mass production core ideas as a way to achieve low costs. The aim of this paper was then to explore the possibilities of adopting mass customization in this context. Two existing low-income housing programs in Brazil were investigated. The discussion on the opportunities and challenges to introduce mass customization ideas in these programs are based on the analysis of the product development process, as well as an analysis of household profiles and needs. The results indicated that the household profile is very diverse in low-income housing. Thus, demand for customization is high, as well as attributed to different products’ characteristics. However, the product development process in this context was found to be very different from a process of mass customized products. Despite the need to modify such process, it was identified that mass customization can be achieved in a variety of ways, and does not necessarily imply on the modernization of construction techniques. However, a major challenge for achieving higher customization in this context seems to be related to the programs’ rules and how it restraints innovation and diversity. Keywords: product development process, low-income housing, mass customization, value managemen

How analysis and synthesis have been understood in design

In the disciplines related to the design of products and services, such as New Product Development and Design Science, there is a lack of a commonly accepted theoretical and methodical basis. This papers starts with the proposition that the ancient method of analysis and synthesis, developed originally by Greek geometers, is the basis of models that have been used to classify and describe the ill structured design problem. In this paper, we examine the possibility of improving our understanding of the design process and therefore lean design management by bringing to light a discussion about the concepts of analysis and synthesis and how these have been interpreted through time. Also, how this concept has been used within engineering design methods. To do so, we investigate how analysis and synthesis have been understood in the literature, indicating similarities and differences between ancient and current understandings

Accounting for knowledge embedded in physical objects and environments : the role of artefacts in transferring knowledge

The intention to investigate the role of artefacts (objects and environments) in codifying, embedding and disseminating knowledge was inspired by an awareness that organisations across all sectors are increasingly being asked not only to provide products in the first instance, but also to support them throughout their service life. Thus a move from product-delivery to product-service designs is suggested. This paper considers ways in which knowledge can be embedded into the physical properties of artefacts and how this can consequently aid the dissemination and management of knowledge in and across stages of life cycles. A literature review and fieldwork based on an ethnomethodological approach are used to investigate this topic. Accounts of the situated meaning of artefacts within social processes are obtained using ethnographic armchair research. Unique adequacy is used to achieve an understanding of how people make sense of artefacts. The initial findings of the current research show that knowledge can be embedded or encoded into the physical properties of artefacts and that this can be successfully transferred from artefact to user