In bottom-up assembly modeling, what do you create and then later add to an assembly?

In bottom-up assembly modeling, the primary approach involves creating individual component parts or piece parts first and then bringing them together to form a complete assembly. This method emphasizes the development of each part independently, allowing for detailed design and refinement before they are incorporated into a larger assembly.

Creating piece parts allows for precise control over the design and dimensions of each individual component. After all necessary piece parts are designed, they are assembled together to create the final product. This is particularly useful when different components are designed by different teams or when modifications are required at the part level before integration into a whole.

The concept of assembling complete assemblies first is more aligned with a top-down approach, where the overall structure is defined before individual components are detailed. Reference sets and subcomponents are related concepts but do not specifically encapsulate the core focus of creating individual parts first in the context of bottom-up assembly modeling. Thus, focusing on piece parts accurately reflects the foundational practice of this modeling approach.