Machine parts to specifications, using machine tools, such as lathes, milling machines, shapers, or grinders., Measure, examine, or test completed units to check for defects and ensure conformance to specifications, using precision instruments, such as micrometers., Monitor the feed and speed of machines during the machining process., Lay out, measure, and mark metal stock to display placement of cuts., Check work pieces to ensure that they are properly lubricated or cooled., Operate equipment to verify operational efficiency., Program computers or electronic instruments, such as numerically controlled machine tools., Fit and assemble parts to make or repair machine tools., Separate scrap waste and related materials for reuse, recycling, or disposal., Set up, adjust, or operate basic or specialized machine tools used to perform precision machining operations., Maintain machine tools in proper operational condition., Evaluate machining procedures and recommend changes or modifications for improved efficiency or adaptability.