Quality Control: What It Is, How It Works, and Careers in Quality Control (2023)

What is Quality Control (QC)?

Quality control (QC) is a process through which a company seeks to ensure that product quality is maintained or improved. Quality control requires the company to create an environment in which management and employees strive for perfection. This is done by training the team, creatingstandardsfor product quality and testing products to check themstatistically significantvariations.

An essential aspect of quality control is the establishment of clearly defined controls. These controls help standardize production and respond to quality issues. Limiting the margin of error by determining which production activities should be performed by which personnel reduces the likelihood that employees will be employed in tasks for which they are not adequately trained.

The central theses

  • Quality control (QC) is a process through which a company seeks to ensure that product quality is maintained or improved.
  • Quality control involves testing units and determining whether they meet final product specifications.
  • The quality control used in a company depends very much on the product or industry, and there are several techniques to measure quality.
  • The food industry uses quality control methods to ensure that customers don't get sick from their products.
  • Quality control creates safe measures that can be implemented to ensure that no defective or damaged product reaches the customer.


quality control

Understand quality control (QC).

Quality control involves testing units and determining whether they meet final product specifications. The purpose of the audit is to determine the need for corrective action in the manufacturing process. Good quality control helps companies meet consumer demand for better products.

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Why is QC necessary?

Creating a product is expensive, time-consuming, and can be unsafe without controls. Furthermore, if a company sends out defective products for purchase, it may be liable for any damage or problems arising from the use of its products. Quality control inspectors ensure that defective or unsafe products are identified and root causes are addressed.

How is this done?

Quality testing is usually performed at every stage of a manufacturing or business process. Employees often start with testsraw material, taking samples from the production line and testing the finished product. Testing at various stages of manufacturing helps determine where a production problem is occurring and what corrective actions are needed to avoid it in the future.

In a non-manufacturing company, the quality review may involve customer service assessments, questionnaires, surveys, inspections or audits. A company can use any process or method to verify that its final product or service meets the customer's needs and is safe and legal.

QC varies by industry

The quality control used in a company is highly dependent on the product or industry. For example, in the manufacture of food and medicine, quality control involves ensuring that the product does not cause illness to the consumer, which is why the company performs chemical and microbiological tests on samples from the production line.

In aircraft construction, quality control and assurance are of paramount importance. Manufacturers are required to document, track, inspect and re-inspect every part and stage of a build to prove that everything is done to very strict standards.

In automotive manufacturing, quality control focuses on parts that meet specifications and tolerances. QC ensures that engines, drivetrains and other mechanical parts run smoothly, efficiently, safely and as intended.

In electronics, quality testing may involve the use of meters that measure current flow and stress testing.

Quality control x quality assurance

Quality control and quality assurance are terms often used to define the same thing, but there are clear differences. Quality control focuses on quality requirements such as B. Ensuring a part meets specifications. Quality assurance describes the sum of all measures and processes necessary to prove that quality requirements are met.

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For quality professionals, this difference means you can move from QA to QA over the course of a QA career. Quality Control is part of Quality Assurance, which consists of programs and departments that assure senior management, customers, and government inspectors that products meet all quality requirements and safety standards.

Types of quality control methods

There are several quality control methods for communicating and tracking inspections and issues. for example aquality control chartis a graph that represents whether sampled products or processes meet intended specifications—and, if not, to what extent they deviate from those specifications.

When a graph analyzes a specific product attribute, it is called a univariate graph. A graph that measures variation in various product attributes is called a multivariate graph. By tracking deviations, companies can see how many defects per unit of production they are producing and what types of defects are occurring. Here are examples of some of the methods that are used.

X bar chart

Randomly selected products are tested for the specified attributes that the graph tracks. A common form of quality control chart is the X bar chart, where the Y axis of the chart indicates the degree to which the variation of the attribute being tested is acceptable. The x-axis tracks the tested samples. By analyzing the pattern of deviations in this graph, you can determine whether the errors are random or systematic.

Taguchi method

DieTaguchi methodQuality control is another approach that emphasizes the role of research and development, design and product development in reducing the occurrence of defects and product failures. The Taguchi Method considers the design more important than the manufacturing process in terms of quality control and seeks to eliminate variations in production before they occur.

100% inspection method

This 100% inspection method is a quality control process in which all parts of the product are viewed and evaluated. This type of quality control serves to rule out product defects. This method is commonly used to classify and produce valuable metals. The 100% inspection method requires data about the manufacturing process and inventory analysis software.

The challenge with using this method is that looking at every element used to create a product is expensive and can destabilize or render the product unusable. For example, if you examine organic strawberries using this method, you risk damaging the berries and making them unsaleable.

Quality control methods help standardize production and answer quality concerns in many industries, from food production to automobile manufacturing.

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career in quality control

Quality control can be a rewarding career if you enjoy working with people, communicating, delivering results, and working to make products better and safer. To become a quality inspector you will need (depending on your industry):

  • High school diploma for entry-level positions
  • A bachelor's degree, depending on the industry
  • experience in an industry
  • Licenses and certifications for some industries and companies

Other qualities required of quality control professionals are:

  • attention to the details
  • Mechanical and mathematical skills
  • physical ability and strength
  • Technical abilities
  • performance under pressure

career path

The path to a career in quality control and assurance varies by industry, so there may be differences. As a rule, however, you need several years of experience in your industry. Typically, you will initially be hired as a Quality Assurance or Control Associate after meeting educational and work experience requirements.

After gaining work experience as a quality specialist or associate, you can move into a management specialist position, leading teams of quality control specialists.You may be taking continuing education courses sponsored by your employer or need to earn certifications like Six Sigma. You may also need to earn a job title such as Certified Quality Inspector.

As you move up the career ladder, you have more options. You can choose or be selected as:

  • QA-Systemmanager
  • quality control operations manager
  • QA-Compliance-Manager

These positions can lead to senior management or QA leadership:

  • quality director
  • Leiter Compliance
  • Vice President of Quality

quality control salaries

The average compensation of QA professionals varies by industry, experience, and job title. Salary increases as you gain experience and move into managerial positions. The Bureau of Labor Statistics reports the following average salaries:

  • Professional, Scientific, and Technical Services: $46,280
  • Manufacture: $40,020
  • Wholesale: $37,800
  • Administration and support services: $30,070

What does quality control mean?

Quality control means how a company measures product quality and improves it if necessary. Quality control can be done in many ways, from testing products to reviewing manufacturing processes and benchmarking. All this is done to monitor significant deviations in a product.

What are the 4 types of quality control?

There are several quality control methods. These include an X-bar chart, Six Sigma, 100% inspection mode, and the Taguchi method.

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Why is quality control important?

Quality control ensures that defective products do not reach the public. Companies that have quality control methods usually have employees who pay close attention to their work.

In food and drug manufacturing, quality control prevents products from making customers sick, and in manufacturing, quality control can ensure that accidents do not occur when people use a product.

What are 3 examples of quality control?

Three examples of quality control can be in the food industry; Oversee ingredient specifications, review supplier lists, and ensure the facility where the food product is manufactured is hygienic.

the end result

Quality control within a company helps to ensure product quality and the overall success of a company. The quality control environment influences employees' attitudes towards the workplace and creates a sense of ownership in the products and the company.

Quality control can be done in many ways, from training staff to creating data-driven tools for testing products and setting standards. Quality control methods help create a safe working environment and products that are safe to use and meet customer needs. Plus, it's a rewarding career path for someone who enjoys investigating problems and improving results.


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