Objects in ArchiCAD are akin to blocks in AutoCAD, cells in MicroStation, or families in Revit. Objects can be furniture, casework, appliances, plumbing fixtures, and more. In Chapter 1, Project Setup and Modeling a Residential Project, you created your own custom stair object. However, that was with the special stair-building interface, exclusive to the Stair tool. The interface is different for creating other types of objects.
Your house is ready for the interior fit-out. In other words, you need to insert the stuff to sit, work, eat, and sleep on. We will go through each room, starting with the rooms on the second floor and work our way down.