Difference between QA & QC

Quality Assurance (QA)

Quality Control (QC)

• It is a procedure that focuses on providing assurance that quality requested will be achieved

• It is a procedure that focuses on fulfilling the quality requested.

• QA aims to prevent the defect

• QC aims to identify and fix defects

• It is a method to manage the quality- Verification

• It is a method to verify the quality-Validation

• It does not involve executing the program

• It always involves executing a program

• It’s a Preventive technique

• It’s a Corrective technique

• It’s a Proactive measure

• It’s a Reactive measure

• It is the procedure to create the deliverables

• It is the procedure to verify that deliverables

• QA involves in full software development life cycle

• QC involves in full software testing life cycle

• In order to meet the customer requirements QA defines standards and methodologies

• QC confirms that the standards are followed while working on the product

• It is performed before Quality Control

• It is performed only after QA activity is done

• It is a Low Level Activity, it can identify an error and mistakes which QC cannot

• It is a High-Level Activity, it can identify an error that QA cannot

• Its main motive is to prevent defects in the system. It is less time-consuming activity

• Its main motive is to identify defects or bugs in the system. It is more time-consuming activity

• QA ensures that everything is executed in the right way, and that is why it falls under verification activity

• QC ensures that whatever we have done is as per the requirement, and that is why it falls under validation activity

• It requires involvement of the whole team

• It requires involvement of Testing team

• Statistical technique applied on QA is known as SPC or Statistical Process Control (SPC)

• Statistical technique applied on QC is known as SQC or Statistical Quality Control