: Using the Create Parts tool to break an element (like a wall or floor) into smaller, schedulable sections.

: Modeling a custom architectural component, such as a door , window , or piece of furniture , to use in your project.

: Using Python or Dynamo to automate the creation of specific geometry or "pieces" within the software.

Mastering Autodesk Revit Architecture 2015: Autodesk Official Press

Could you please clarify what you mean by making a for Autodesk Revit Architecture 2015 ? This request could mean a few different things:

Please let me know which of these you are looking for so I can provide the right steps!