Understand basic Bill of Materials (BOM) and how products are built from many parts.Read and follow assembly structures to know how parts fit together.Use a CAD software (computer design program) to create and edit simple 3D models.Choose the right parts and materials for a design.Talk with suppliers in India and China to order custom-made parts.Work with the production team to make sure designs can be built.Check drawings and designs for mistakes before sending them to manufacturing.Help improve existing products to make them easier to build.Communicate clearly with engineers, managers, and suppliers.Keep design files organised and updated.