Self-monitoring machines can alert inspectors to production problems, and automatically repair defects in some cases. Many firms have completely automated inspection with the help of advanced vision systems, using machinery installed at one or several points in the production process. Inspectors in these firms calibrate and monitor the equipment, review output, and perform random product checks. As a result, some inspectors examine similar products for an entire shift, whereas others examine a variety of items. Inspectors in some industries may be on their feet all day and may have to lift heavy objects, whereas in other industries they sit during most of their shift and do little strenuous work.
Some inspectors work evenings, nights, or weekends.
In these cases, shift assignments generally are made on the basis of seniority. Overtime may be required to meet production goals. About 2 out of 3 worked in manufacturing establishments that produced such products as industrial machinery and equipment, motor vehicles and equipment, aircraft and parts, primary and fabricated metals, electronic components and accessories, food, textiles, and apparel. Inspectors, testers, and graders also were found in temporary help services, transportation, wholesale trade, engineering and management services, and government agencies. Simple jobs may be filled by beginners provided with in-house training.