Contractors' Perspective on the Selection of Innovative Sustainable Technologies for Low-carbon Retail Buildings

Abstract

The use of innovative sustainable technologies (IST) has been regarded as an effective approach to enhancing energy efficiency and reducing carbon emissions of buildings. However, contractors face significant challenges in the selection of IST. The reported challenges in the literature include: lack of skills and knowledge, uncertainties, risks and the rapid development of a large number of technological alternatives and decision criteria. The selection process emerges as a multi-attribute, value-based task that includes both qualitative and quantitative factors, which are often assessed with imprecise data and human judgments. This paper aims to establish the decision criteria for the selection of IST for achieving low carbon existing retail buildings with a focus on the main contractor's perspective. The arguments are informed by the combination of literature review and an in-depth case study with a UK leading contractor. Five broad decision criteria are identified systematically drawing on the contractor's practice. The established criteria are weighted and ranked using the analytic hierarchy process and expert opinions; with 'margin opportunity' being the most important, followed by 'repeat business', 'investment costs', 'differentiation' and then 'transferability'. The findings should facilitate the integration of various facets of the selection process and stimulate contractors to use IST.

Construction Contractors’ Carbon Emissions Reduction Intention: A Study Based on Structural Equation Model

“…Research by Hwang et al [63] confirmed that the experience and technical competence of construction professionals are key factors influencing the productivity of green construction projects. Zainab [64] demonstrated that PBC could significantly impact behavioral intentions when contractors deploy new designs, technologies, material components, or construction methods within a project. The more contractors perceive their ability to participate effectively in such behavior, the more likely they are to implement it directly.…”