Quality Assurance vs Quality Control – What is the Difference?

What is Quality?
Quality is meeting the requirement, expectation and needs of the customer being free from defects, lacks and substantial variants. There are standards needs to follow to satisfy the customer requirements.
What is Assurance?
Assurance is provided by organization management, it means giving a positive declaration on a product which obtains confidence for the outcome. It gives a security that the product will work without any glitches as per the expectations or requests.
Recommended Reading => Does Quality Assurance Remove Need for Quality Control?

What is Quality Assurance?

What is Quality Assurance
Quality Assurance is known as QA and focuses on preventing defect. Quality Assurance ensures that the approaches, techniques, methods and processes are designed for the projects are implemented correctly. Quality assurance activities monitor and verify that the processes used to manage and create the deliverables have been followed and are operative.
Quality Assurance is a proactive process and is Prevention in nature. It recognizes flaws in the process. Quality Assurance has to complete before Quality Control.
What is Control?
What is Quality Control
Control is to test or verify actual results by comparing it with the defined standards.

What is Quality Control?

Quality Control is known as QC and focuses on identifying defect. QC ensures that the approaches, techniques, methods and processes are designed in the project are following correctly. QC activities monitor and verify that the project deliverables meet the defined quality standards.
Quality Control is a reactive process and is detection in nature.. It recognizes the defects. Quality Control has to complete after Quality Assurance.
Difference between quality assurance and quality control
Many people think QA and QC are same and interchangeable but this is not true. Both are tightly linked and sometimes it is very difficult to identify the differences. Fact is both are related to each other but they are different in origins. QA and QC both are part of Quality Management however QA is focusing on preventing defect while QC is focusing on identifying the defect.

Quality Assurance vs Quality Control

Quality Assurance vs Quality Control

Quality AssuranceQuality Control
It is a process which deliberate on providing assurance that quality request will be achieved.QC is a process which deliberates on fulfilling the quality request.
A QA aim is to prevent the defect.A QC aim is to identify and improve the defects.
QA is the technique of managing the quality.QC is method to verify the quality.
QA does not involve executing the program.QC always involves executing the program.
All team members are responsible for QA.Testing team is responsible for QC.
QA e.g. Verification.QC e.g. Validation.
QA means Planning for doing a process.QC Means Action for executing the planned process.
Statistical Technique used on QA is known as Statistical Process Control (SPC.)Statistical Technique used on QC is known as Statistical Quality Control (SPC.)
QA makes sure you are doing the right things.QC makes sure the results of what you’ve done are what you expected.
QA Defines standards and methodologies to followed in order to meet the customer requirements.QC ensures that the standards are followed while working on the product.
QA is the process to create the deliverables.QC is the process to verify that deliverables.
QA is responsible for full software development life cycle.QC is responsible for software testing life cycle.

Key Points
  • In QA, processes are planned to evade the defects.
  • QC agreements with discovery the defects and modifying them while making the product.
  • QA detects weakness.
  • QC detects defects.
  • QA is process oriented
  • QC is product oriented.
  • QA is failure prevention system.
  • QC is failure detection system.