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What Quality Control Inspectors Do About this section

Quality control inspectors
Quality control inspectors remove or discard all products and equipment that fail to meet specifications.

Quality control inspectors examine products and materials for defects or deviations from specifications.


Quality control inspectors typically do the following:

  • Read blueprints and specifications
  • Monitor operations to ensure that they meet production standards
  • Recommend adjustments to the assembly or production process
  • Inspect, test, or measure materials
  • Measure products with calipers, gauges, or micrometers
  • Operate electronic inspection equipment and software
  • Accept or reject finished items
  • Remove all products and materials that fail to meet specifications
  • Report inspection and test data such as weights, temperatures, grades, moisture content, and quantities inspected

Quality control inspectors, also called testers, sorters, samplers, and weighers, monitor nearly all manufactured products to ensure that they meet specified standards. Job duties vary across the manufacturing industries in which most of these inspectors work, which include foods, glassware, motor vehicles, electronic components, and structural steel.

Quality control workers use a variety of tools. Although some still use hand-held measuring devices, such as calipers and alignment gauges, workers more commonly operate electronic inspection equipment, such as coordinate-measuring machines (CMMs) and three-dimensional (3D) scanners. Inspectors testing electrical devices may use voltmeters, ammeters, and ohmmeters to test potential difference, current flow, and resistance, respectively.

Quality control workers record the results of their inspections through test reports. When they find defects, inspectors notify supervisors and help to analyze and correct production problems.

Some manufacturers have automated inspection processes, with advanced vision inspection systems installed at one or several production points. Inspectors monitoring these automated systems check equipment, review output, and conduct random product checks.

The following are examples of types of quality control inspectors:

Materials inspectors check production materials by sight, sound, or feel to locate imperfections such as cuts, scratches, missing pieces, or crooked seams. Materials inspectors also may use devices such as infrared microscopes to analyze plastic, rubber, and other substances and to look for deterioration or defects.

Mechanical inspectors generally verify that parts fit, move correctly, and are properly lubricated. They may check the pressure of gases and the level of liquids, test the flow of electricity, and conduct test runs to ensure that machines run properly.

Work Environment About this section

Quality control inspectors
Quality control inspectors may be required to stand for long periods of time or lift heavy objects.

Quality control inspectors held about 571,600 jobs in 2021. The largest employers of quality control inspectors were as follows:

Manufacturing 64%
Administrative and support services 9
Professional, scientific, and technical services 8
Wholesale trade 6

Inspectors may be required to stand for long periods and may have to lift heavy items.

Injuries and Illnesses

Some quality control inspectors are exposed to loud noises, moving mechanical parts, and hazardous contaminants, such as airborne particles that irritate the eyes and skin. Workers typically wear protective eyewear, ear plugs, and appropriate clothing to help protect themselves from injury.

Work Schedules

Most quality control inspectors work full time. Some inspectors work evenings, overnight, or weekend shifts. Shift assignments may be based on seniority. Overtime may be required to meet production deadlines.

How to Become a Quality Control Inspector About this section

Quality control inspectors
Quality control inspectors usually receive up to one year of on-the-job training.

Quality control inspectors typically need a high school diploma to enter the occupation and receive on-the-job training once employed.


Quality control inspectors typically need a high school diploma for entry-level jobs. Postsecondary certificate programs are available for instruction on quality control concepts, such as inspection planning and auditing. Students in these programs also gain familiarity with tools and technologies that quality control inspectors use.

Some employers require or prefer to hire candidates who have an associate’s or bachelor’s degree in a field such as quality control management or engineering.


Workers typically receive on-the-job training that lasts more than 1 month and up to 1 year.

In some industries, such as automobile and aerospace manufacturing, inspectors train for the occupation in an apprenticeship program. Apprentices typically receive paid on-the-job training and instruction. Requirements for entering these programs, which are typically sponsored by trade associations or businesses, may include having a high school diploma, related work experience, or relevant licenses.

Training for new inspectors may cover the use of special meters, gauges, computers, and other instruments; quality control techniques such as Six Sigma; blueprint reading; safety; and reporting requirements.

Licenses, Certifications, and Registrations

The American Society for Quality (ASQ) offers various certifications, including a designation for Certified Quality Inspector (CQI), and various levels of Six Sigma certifications. Although optional, certification may demonstrate a level of competence and professionalism that makes candidates more attractive to employers. It also may increase opportunities for advancement. Requirements for certification generally include a certain number of years of experience in the field and passing an exam.

Important Qualities

Detail oriented. Quality control inspectors must be able to focus to notice flaws or deficiencies in finished products or materials. 

Math skills. Knowledge of basic math is important for measuring, calibrating, and calculating specifications in quality control testing.

Mechanical skills. Quality control inspectors use tools and machinery when testing products.

Physical stamina. Some quality control inspectors must stand for long periods on the job.

Physical strength. Quality control inspectors may be required to lift or maneuver heavy production materials or finished products.

Technical skills. To ensure that products and parts meet quality standards, inspectors must understand the relevant blueprints, technical documents, and manuals.

Pay About this section

Quality Control Inspectors

Median annual wages, May 2021

Total, all occupations


Inspectors, testers, sorters, samplers, and weighers


Other production occupations



The median annual wage for quality control inspectors was $38,580 in May 2021. The median wage is the wage at which half the workers in an occupation earned more than that amount and half earned less. The lowest 10 percent earned less than $28,820, and the highest 10 percent earned more than $62,970.

In May 2021, the median annual wages for quality control inspectors in the top industries in which they worked were as follows:

Professional, scientific, and technical services $46,280
Manufacturing 40,020
Wholesale trade 37,800
Administrative and support services 30,070

Most quality control inspectors work full time. Some inspectors work evenings, overnight, or weekend shifts. Shift assignments may be based on seniority. Overtime may be required to meet production deadlines.

Job Outlook About this section

Quality Control Inspectors

Percent change in employment, projected 2021-31

Total, all occupations


Other production occupations


Inspectors, testers, sorters, samplers, and weighers



Employment of quality control inspectors is projected to decline 3 percent from 2021 to 2031.

Despite declining employment, about 67,800 openings for quality control inspectors are projected each year, on average, over the decade. All of those openings are expected to result from the need to replace workers who transfer to other occupations or exit the labor force, such as to retire.


Continued improvements in technology allow manufacturers to automate some parts of inspection tasks, which increases workers’ productivity. For example, use of three-dimensional (3D) scanners decreases the amount of time required to inspect parts and finished goods for correct measurement.

Despite technological advances in quality control in many industries, automation cannot replace all tasks that inspectors do. Personal inspections and testing validation will continue to be needed for some products, such as those that require testing for taste, texture, or performance.

Employment projections data for quality control inspectors, 2021-31
Occupational Title SOC Code Employment, 2021 Projected Employment, 2031 Change, 2021-31 Employment by Industry
Percent Numeric

SOURCE: U.S. Bureau of Labor Statistics, Employment Projections program

Inspectors, testers, sorters, samplers, and weighers

51-9061 571,600 554,500 -3 -17,200 Get data

Contacts for More Information About this section

For details about apprenticeships or other work opportunities in this occupation, contact the offices of the state employment service, the state apprenticeship agency, or local businesses that employ quality control inspectors. Apprenticeship information is available from the U.S. Department of Labor’s Apprenticeship program online or by phone at 1-877-872-5627. Visit to search for apprenticeship opportunities.

For more information about quality control inspectors, including certification, visit

American Society for Quality (ASQ)

For more information about quality control training, visit

International Society of Automation (ISA)

Quality Assurance Association (QAA)


Inspectors, Testers, Sorters, Samplers, and Weighers


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