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Difference Between Quality Assurance and Quality Control

Difference Between Quality Assurance and Quality Control

Ever notice how your favorite apps feel like magic? No annoying crashes, smooth performance, features that just work? This isn’t magic, it’s the tireless work of two unsung heroes: Quality Assurance and Quality Control! In this blog, we’ll break down what QA and QC are, how they differ, and show you how they work together to ensure your favorite apps are flawless. Buckle up for a journey into the world of perfection!

Table of Contents:

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What is Quality Assurance (QA)?

Quality Assurance (QA) is a proactive process that aims to prevent defects and errors in software applications. Using a systematic methodology, QA ensures that the processes involved in product development are not only sufficient but also consistent.

  • QA ensures top-notch software development.
  • It prevents defects through guidelines adherence.
  • QA involves continuous process audits.
  • Contributes to risk assessment and thorough testing.

For Example, the implementation of quality assurance involves the use of standardized procedures for the creation and review of code. This thorough practice ensures that each code segment is tested and reviewed before being integrated into the primary code base. This approach guarantees the quality of the product right from the development phase.

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What is Quality Control (QC)?

Quality Control (QC) is more of a reactive process that involves identifying and correcting errors. It ensures that the method of making the application software is followed correctly and effectively. It involves the inspection and testing of applications to identify any defects after creation.

  • QC checks final software for defects.
  • Focus is on identifying and fixing issues.
  • Involves rigorous testing and inspections.
  • QC is reactive, addressing defects in the final product.

For example, suppose a manufacturing company randomly selects items from the production line as part of quality control and checks them for defects. If a product does not meet the specified standards, it is either corrected or rejected. Quality control ensures that the end product meets the quality standards set by the company.

Quality Assurance and Quality Control

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Key Differences Between Quality Assurance and Quality Control

Quality Assurance is a pre-production process on the other hand Quality Control is a post-production process. For effective management and implementation of quality practices, you must have a clear understanding of their basic differences.

Below, you will find the differences between Quality Assurance and Quality Control:

Conceptual Foundation

  • QA is fundamentally about building quality into the process itself. It’s a set of activities designed to ensure that the software development and maintenance processes are adequate to produce a quality system. 
  • In contrast, QC is about ensuring that the product or service meets quality standards. This is achieved through inspection and software testing activities.

Operational Approach

  • QA includes regular process audits, process checklists, process standards, and project audits.
  • QC involves activities like testing every product part for its adherence to the quality standard. This means it tests and inspects products or services after they are made to identify any defects. 

Focus and Scope

  • The focus of QA is on the process – ensuring the right process is followed during every phase of product development. It’s more about ‘quality management’.
  • QC’s focus is strictly on the product or service itself. It’s more about ‘quality inspection and correction’.


  • QA is generally a company-wide process as it involves how hierarchy and pipelines work in an organization.
  • QC is usually done at the end of the production line or after the service. Their primary task is to identify and resolve the defects that might not have been noticed during the earlier processes.
Key Differences Between Quality Assurance and Quality Control

Below is a tabular comparison of both Quality Assurance and Quality Control in software development and testing, which everyone must know:

ParametersQuality AssuranceQuality Control
ObjectiveAimed to avoid defectsAimed to identify and fix defects
Stage in DevelopmentDone in the software development life cycleDone in the software testing life cycle
MethodologyMethod to manage quality – VerificationMethod to verify quality – Validation
Time ConsumptionLess time-consuming activityMore time-consuming activity
Statistical TechniqueUses Statistical Process Control (SPC)Uses Statistical Quality Control (SQC)

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Quality Assurance Vs. Quality Control: Which is Better?

Quality assurance and quality control are crucial for achieving optimum quality. Deciding between quality assurance (QA) and quality control (QC) is like saying that one side of a coin is better than the other. Both functions fulfill different but interdependent tasks in building an effective and comprehensive quality management system.

Quality assurance acts as an architect that designs and implements proactive measures to minimize the risk of defects in the development phase. On the other hand, quality control checks the final product to identify and correct errors that may have escaped the proactive measures of quality assurance.

So instead of picking a favorite between QA and QC, it’s best to use both together. Through careful planning, QA helps the work of quality control run more smoothly, while QC’s thorough review ensures that nothing falls through the cracks in the end.


A well-rounded quality management team that is proficient in both Quality Assurance and Quality Control is key to consistently delivering high-quality products and services. Integrating QA and QC strategies not only achieves superior quality standards but also plays a crucial role in improving customer satisfaction and building brand loyalty.

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