Search

It is clear that the current industry process needs to improve in order to routinely deliver comfortable low-carbon buildings. Overheating in buildings designed to be of low energy is one of the key symptoms of current problems. Many initiatives aim to improve building performance and the industry process. A selection of these initiatives are reviewed including: the EU Energy Performance of Buildings Directive; the Green Star, Leadership in Energy and Environmental Design, Building Research Establishment's Environmental Assessment Method (BREEAM) and National Australian Building Environmental Rating Standards (NABERS) rating schemes; the Passivhaus standard; the Soft Landings process and Building Information Modelling (BIM). The BIM approach is being actively promoted based on the assertion that the building industry process has stagnated compared to other industries suggested as productivity benchmarks such as the electronics industry. This study highlights the potential role that could be played by BIM as a framework to address the performance gaps, and suggests that processes from the BIM benchmark industries should be investigated for potential adoption. The organizational context and processes of the electronics industry are described, and it is proposed that they could be usefully adapted to reduce the scale and impacts of the building industry performance gap. Key conclusions are that public domain performance data are important, and that the adoption of a quality systems approach will be required to deliver the intended performance in practice, eliminate overheating and avoid excess energy use. [ABSTRACT FROM AUTHOR]

Gaps between intended and actual performance which impact on indoor environment, energy use and carbon emissions have been well documented and are nowhere more important than when they present in performance problems such as building overheating and consequent occupant discomfort and high energy running costs. Here, such gaps are explored through a review of relevant literature and related illustrative investigations. Key drivers of those performance gaps are identified and located in the stages of the building industry process. Three case studies, of one office and two houses, are provided, highlighting where faults arise and may or may not be effectively dealt with and the reasons why. These include faults at the Implementation, Validation and Operation stages and the paper concludes by summing up generic failings in the industry that lead into the following paper by the same authors that offers an approach and potentially effective solutions to reduce such performance gaps by correctly using a BIM approach to quality control in the construction industry. [ABSTRACT FROM AUTHOR]