Quality control (QC) is a process by which entities review the quality of all factors involved in production. ISO 9000 defines quality control as “A part of quality management focused on fulfilling quality requirements”.
Inspection is a major component of quality control, where physical product is examined visually (or the end results of a service are analyzed). Product inspectors will be provided with lists and descriptions of unacceptable product defects such as cracks or surface blemishes for example.
What is Quality Control and meaning?
Quality control vs. quality assurance
These two terms are often used interchangeably, and while there are activities within these processes that are interrelated, they are actually defined differently. Quality assurance or QA is focused on providing confidence that the companys quality requirements will be fulfilled, and it includes all the activities that the company has implemented to provide such confidence. Quality control, on the other hand, refers to the inspection aspect of quality management, specifically the techniques and activities used to meet the quality requirements.
What is quality control?
Quality control or QC is the process that businesses use to ensure that a product or service adheres to a predefined set of quality standards or meets the requirements of customers or clients. Quality control usually requires the business to create an environment where employees and management are always striving for perfection. This requires extensive training, creating benchmarks for measuring product or service quality, and testing to check for any significant variations in quality.
Why is quality control important?
There are numerous reasons why quality control is important:
Quality control process
Companies typically follow a set procedure to ensure quality control, including:
Setting testing standards
To implement a quality control program, a company must first decide what standards it wants to meet. Next, it must be determined the extent of the actions that will be taken. For example, the team must decide how many samples will be taken and tested.
Testing raw materials and various stages
Quality control usually involves testing every step of a companys manufacturing process. QC employees may begin by testing the raw materials that are used to create a product and then testing at various stages within the manufacturing process to identify where any problems are occurring.
Then employees would correct problems to prevent them from happening again in the future. The exact quality control that a company uses is dependent on the industry and product.
For example, in food manufacturing, the company QC team performs microbiological testing to ensure that the completed product doesnt make consumers sick. They may also perform quality control of the food in its packaging to ensure it is visually appealing. In the car manufacturing industry, however, quality control may focus on the way that different parts interact and operate together.
Data collection and decisions
After correction of problems found, real-world data must be collected and the reports should be delivered to management. Finally, corrective action must be taken. For example, the company may decide to repair any remaining defective units or eliminate them.
If too many of the products are defective, a company must establish a plan for improving the production process or, if the problem is with the supplies being used, purchasing raw materials from elsewhere. Finally, the quality control method must be ongoing to monitor for new signs of problems.
Methods for quality control in business
Here are a few methods for performing quality control in business:
Products can be randomly selected and tested according to a given attribute or attributes that can be tracked on a quality control chart. This graphic is designed to depict whether sampled products or processes meet the companys quality standards and, if not, how much they vary from the companys requirements. The charts can analyze specific attributes or measure variances in several product attributes. By analyzing the pattern in the chart, companies can determine if the defects are randomly occurring or systematic. Charts that measure variances in multiple product attributes are called multivariate charts, whereas those that measure only a specific attribute are called univariate charts. X-bar charts are commonly used as quality control charts, although companies may also use:
Taguchi method of quality control
This method emphasizes the roles of research and development, product development and product design in reducing the likelihood of defects and errors in products. It focuses on design rather than the manufacturing process and tries to eliminate variances in production before they happen.
This process involves measuring a portion of all products and then making inferences about the remainder of the products based on that subset.
What is the meaning for quality control?
What are the 4 types of quality control?
What is quality control and example?
What are the 3 types of quality control?
- Ampoule examiners.
- Bag graders.
- Cigarette examiners.
- Compressed gas testers.
- Machined parts quality inspectors.
- Materials inspectors.
- Mechanical inspectors.