Have you ever struggled to make changes to large assemblies in your CAD package? In this course, Onshape Top-down Skeleton Modeling - Creating an Excavator Arm, you'll gain the knowledge and practice needed to create your own top-down skeleton sketch driven assembly. First, you'll explore the advantages of various modeling techniques, including bottom-up design, middle out design, skeleton top down design, and master model top down design. Next, you'll discover how to create a kinematic layout sketch which employs top down skeleton modeling techniques, allowing you to validate your design intent early, and drive your individual 3D parts. Finally, you'll learn how to assemble these parts, as well as how to update and work with your assembly. When you're finished with this course, you'll have the skills and knowledge of skeleton top-down design techniques needed to create your own mechanical designs. Software required: Onshape.