The workpiece represents the raw material or stock that is going to be machined by the manufacturing operations. Its use is optional in Creo NC. Creo NC allows you to create or assemble the workpiece. You can manually create the workpiece (manual workpiece) or allow Creo NC to automatically create it using standard shapes and your choice of dimensions (automatic workpiece). Alternatively, you can assemble the workpiece using an existing design model. In this case, the workpiece can have features inherited or merged from the design model.