The standard covers nonsupervisory work involved in the manufacture and repair of parts and items of equipment which require the use of various types of standard and special machine tools and their attachments to machine metals, metal alloys, and other materials. The work requires skills ranging from initial planning of necessary work sequences to performing precision handwork to fit, finish, and assemble machined parts and equipment. For both WG-10 and WG-11 machinists general description of the job is provided. The skill and knowledge required, responsibility, physical effort, and working conditions are explained. (AG)