As the inspection for sustainable performances throughout the post-construction phase becomes an absolute necessity, engagement of an Integrated Knowledge-based Building Management System using nD BIM applications (BIM-IKBMS) is anticipated promote the implementation of sustainable building performances. Based on the concept model made from literature review by the previous article, this study is the second step for nD BIM-IKBMS R & D series that concentrates on the functional modelling. This study follows the principle of axiomatic design and develops the proposed framework in SADT language using IDEF0 diagrams. This study results in 4-hierarchical IDEF0 diagrams, and the proposed system is expected to be validated in actual projects in future studies.Current output:Publication 1