Let us introduce you into the importance of Quality Control (QC), and how it works.

Firstly, a brief introduction.

QC goes beyond ordinary statistical controls and improvement methods. It implies an overview and re-evaluation of a product. The basic goal of this process is to ensure that the products or services that are provided meet specific requirements and characteristics, such as being dependable, satisfactory, safe and fiscally sound.

Companies engaged in quality control typically have a team of workers who focus on testing a number of products. The products or services to be examined are usually chosen at random. The aim of a quality control team is to identify products or services that do not meet the specific standard of quality desired by the company. If a problem is identified, it is the job of a quality control team or professional to make sure that the problem is receiving attention. They might be required to stop the production or service until the problem is solved.

It is usually not the job of a quality control team to correct these quality issues. Other staff is usually involved in the process of discovering the cause of quality issues to fix them. After the problems are solved and the desired quality has been achieved, the production will continue as per normal.

Next, we will show you the difference between QC and Quality Assurance (QA) which are often used as synonyms.

QA is defect orientated and so, the purpose of QA is for defect prevention. The goal of QA is to improve development and test processes so that defects do not arise when the product is being developed. On the other hand, QC is product orientated and the focus is on defect identification. The goal of QC is to identify all the defects after the production, before it is released.

So now, we will show you how QC normally works.

In order to implement an effective QC program, an enterprise has to first determine a standards, which consist of the specifications the product or service has to fulfill. After that, a range of QC actions need to be determined; for example, the percentage of units to be tested from each lot.  Next, some statistics need to be collected; for example, the percentage of units that usually fail. After this, it has to be decided which action to take; for example, whether defective units need be repaired or rejected. Finally, a QC has to be an ongoing process to ensure that corrective efforts have led into satisfactory results and also to immediately detect recurrences or new instances of trouble.