Currently IO uses several AFP models to deliver projects. These are the Build-Finance (BF), Build-Finance-Maintain (BFM), Design-Build-Finance (DBF), and Design-Build-Finance-Maintain (DBFM) models. The current list of projects assigned to IO consists of buildings of various types (hospitals, courts, etc.). The methodology set out in this guide therefore relates to BF, BFM, DBF and DBFM buildings.