Purpose The purpose of this study is to describe life cycle cost (LCC) and life cycle assessment (LCA) evaluation for single story building house in Malaysia. Two objective functions, namely, LCA and LCC, were evaluated for each design and a total of 20 alternatives were analyzed. Two wall schemes that have been adopted from two different recent studies toward mitigation of climate change require clarification in both life cycle objectives. Design/methodology/approach For this strategic life cycle assessment, Simapro 8.3 tool has been chosen over a 50-year life span. LCC analysis was also used to determine not only the most energy-efficient strategy, but also the most economically feasible one. A present value (PV)-based economic analysis takes LCC into account. Findings The results will appear in present value and LC carbon footprint saving, both individually and in combination with each other. Result of life cycle management shows that timber wall−wooden post and beam covered by steel stud (W5) and wood truss with concrete roof tiles (R1) released less carbon emission to atmosphere and have lower life cycle cost over their life span. W5R1 releases 35 per cent less CO2 emission than the second best choice and costs 25 per cent less. Originality/value The indicator assessed was global warming, and as the focus was on GHG emissions, the focus of this study was mainly in the context of Malaysian construction, although the principles apply universally. The result would support the adoption of sustainable building for building sector.
The Malaysian government motivates constructor companies to use Building Information Modeling (BIM) on their projects because it can dominate problems such as design error, delay, and construction-overrun costs. This research also assesses the effect of BIM in the design phase of the construction process and how this technology can detect all existing clash in construction plans during the design phase. The research was carried out through a case study that contains an architectural, structural, and Mechanical, Electrical and Plumbing (MEP) BIM models and their following clash detection. The current study implemented Autodesk Revit and Autodesk Navisworks Manage as BIM tools to develop features to simplify and automatically clash detection process. The result from the case study analysis revealed that BIM is an appropriate tool for detecting clashes among the building elements. Therefore, constructability issues can be determined earlier during the design phase before the construction phase begins, controlling project cost, time, and having a seamless design to produce a better building.
Malaysia has made continuous efforts to tackle energy sustainability challenges in recent years. There are significant opportunities to cut energy consumption and greenhouse gas emission (GHG) through retrofitting of existing domestic stocks. Due to the extremely fragmented nature of retrofit practice in the construction industry, there are some challenges among project stakeholders, including home occupants and builders in retrofitting residential buildings. There is a lack of research regarding the client’s requirements for housing retrofit priorities and preferences for retrofitting measures and materials. Therefore, the aim of this research is exploring the owner’s point of view for housing retrofit and their decision-making factors for choosing retrofit measures. In this study, by using sampling techniques, 400 people staying in Kuala Lumpur and Johor Bahru were selected for the housing retrofit preference survey. Statistical Package for the Social Sciences software (SPSS Version 22) was used as a statistical software to analyze survey data. It was revealed from the questionnaire survey that window/door is the top priority for clients to improve energy efficiency. Furthermore, the most critical factors in improving energy efficiency are initial cost and thermal performance, respectively. Moreover, in decision-making factors for selecting construction materials, owners emphasized on initial cost and payback time as important factors. Therefore, all experts in the construction industry should take into account the interests of customers with technical matters at the same time. In conclusion, this research empowers professionals to know homeowner needs and preferences from the beginning of retrofit projects.
Building Information Modeling (BIM) is a new paradigm in the architecture, engineering, and construction industry in Malaysia. In the literature, there are numerous reviews of BIM implementation on new buildings, while the BIM application in retrofitting existing buildings is rather disregarded yet. Only limited research has investigated the use of the potential of BIM in residential retrofit projects. This study seeks to investigate the current status of implementation of BIM for retrofitting residential buildings practicality. The research used the questionnaire as a quantitative method to collect data in the current study. One hundred twelve professionals were chosen for this study, and the response rate was 49 percent (55 respondents). The sample of the questionnaire survey consists of the academic experts and construction engineers and architects, BIM software designers, and construction organizations in Malaysia. The data collected through the respondents are analyzed using the Statistical Package for the Social Sciences software (SPSS Version 22). The results revealed that most of the respondents (47.3%) have a low level of awareness about BIM, and the majority of the respondents (29.1%) do not use BIM in their projects. Based on the investigation, the adoption of BIM residential buildings is timely. The most common obstacles to the BIM adoption for residential retrofit are the lack of customer demand, high initial investments, and lack of standards. In conclusion, this research provides information about the feasibility of BIM adoption for retrofitting the existing residential building. It is expected that this knowledge could be useful for BIM development and tackle barriers regarding BIM adoption in the Malaysia construction sector.
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