Early design BIM-based Target Value Design for public facilities: An application to a healthcare facility case

The objective of this article is to develop an agile application based on BIM for the integration of Target Value Design into the design process, in order to offer a resource to support decision-making process from the early design stages. The research applies the operational research method by the methodological steps: (a) Identify input data sources and develop the input setup; (b) Develop BIM-based cost estimation of visual programming and apply program in one case; (c) Discussion of the potentialities and challenges of the proposed approach to outline the research findings. A direct link between cost estimation and BIM objects was created to promote Target Value Design in the design process through visual programming. The necessary agility was obtained through semi-automation of the process of incorporating the cost data within the parametric modelling family and extracting cost estimate totals from the model to a pre-defined spreadsheet, allowing the continuous updating of models.