GENERATIVE DESIGN WITH COST INPUTS FOR HOUSING DEVELOPMENT BOARD PROJECTS

Abstract

The Housing Development Board of Singapore (HDB) has emerged as the first and only public sector that has been awarded the BIM award. In 2014, HDB has published a HDB BIM guideline to showcase the HDB BIM’s workflow but the role of a quantity surveyor (QS) seems to be excluded in the project review team. This paper identified the problem of the lack of QS involvement as an opportunity cost for HDB. A 5D BIM costing system is generated for QS to better utilize existing information provided by HDB in the HDB BIM’s guideline. This costing system was validated against an actual HDB Build-to-Order project located in woodlands and it was found that costs inputs by QS would provide for a more comprehensive review during the design stage of construction. However, rigorous testing and iterations are required for a more accurate validation of the proposed costing system.