Development of decision making criteria for roof stacking construction method selection

Accommodating populations in cities became increasingly a complex task. With the mounting local and global migration seeking better opportunities in cities, the current urban agendas has put forward compact cities as a promising solution towards sustainable urban development. Roof stacking is considered an approach towards increase cities’ density. However, the selection of optimum roof stacking construction method is merely based on subjective evidence based on architects’ or owners requirements. There is an urgent need to identify a universal criteria for decision making for sustainable roof stacking. Therefore, this research aims to identify the influential criteria behind the selection and decision making on roof stacking methods. An intensive review of literature, individual interview, and pilot surveys have been carried out. A list of 37 decision making criteria have been identified and characterised under six categories: cost, time, safety, quality, environment, and logistics. A questionnaire has been design and surveyed among less than 300 architects, as active stakeholders, in addition to researchers from the field of building and construction. The importance of the identified criteria have been ranked. As a result, safety and quality measures of construction were set as priority followed by environmental measurements resembled in energy consumption. The outcomes of this research draws the lines to develop a new tool for aiding the decision making process on roof stacking