A multi-criteria decision-making model for selecting curtain wall systems in office buildings

The purpose of this paper is to develop a model that facilitates the evaluation and selection processes of curtain wall systems used in office buildings. A comprehensive literature review and interviews with local experts were conducted to identify common types of curtain wall systems used in office buildings and their selection criteria. A questionnaire was designed and completed using multi-criteria decision-making techniques through face-to-face meetings with consultants in the Eastern Province of Saudi Arabia. The proposed model was implemented in prototype software as a proof of concept. The results revealed that fire resistance scored the highest weighting of all the criteria. Furthermore, precast concrete cladding panels were found to be the best system for use in office buildings located in the Eastern Province of Saudi Arabia. The model validation reveals that the score for any curtain wall system varies depending on the nature of the project and that the prioritisation of criteria can vary from one practitioner to another. The model captures the knowledge of professionals who are experts in the prioritisation of criteria for selecting curtain wall systems. The research design presented expands the boundaries of knowledge of the relevant literature, through demonstrating a conceptual framework incorporating different techniques into a computerised model. It has practical implications through presenting a systematic procedure for developing and adopting a computerised decision-making tool, which aligns experts' professional practice and requirements, for use in selecting fragmented options.