There is conflict in the hierarchy structure of processes classification across texts. Exam the following two charts. One will see similarities and differences between the two.
Manufacturing Process Hierarchy Diagram One
Manufacturing processes can be divided into two basic types: (1) processing operations and (2) assembly operations. A processing operation transforms a work material from one state of completion to a more advanced state that is closer to the final desired product. It adds value by changing the geometry, properties, or appearance of the starting material. In general, processing operations are performed on discrete workparts, but some processing operations are also applicable to assembled items. An assembly operation joins two or more components in order to create a new entity, called an assembly, subassembly, or some other term that refers to the joining process (e.g., a welded assembly is called a weldment).
Manufacturing Process Hierarchy Diagram Two
