Why QA Is Important in Software Development

8 mins |

A car crashed into the building

Every business wants to get a running app without bugs and defects. There is a special place in software development companies for people responsible for software quality assurance. Such specialists have various job titles such as Quality Assurance engineers, Quality Assurance specialists, testers, or software testing engineers. 

The role of a Quality Assurance specialist in project development is hard to overestimate, and the cost of a high-level tester in the project expenditure statement is high. However, are the QA specialists really so necessary for the project?

Some software development companies try to use project managers as Quality Assurance specialists and don’t hire testers. 

Some business owners believe that high-class developers will write perfect code for their apps with no defects, no bugs, and no integration issues. 

Some clients are ready to test their product by themselves in trying to decrease the project expenditure statement. 

qa team

Is this the correct approach? Why QA is important in software development? What is special about being a QA specialist? What is software testing, and whether everybody can run tests? Why don’t developers just stop fooling around and start making bug-free software? What are the benefits of different types of testing that QA specialists perform? 

We will cover all these questions in our article and try to dispel all myths about quality assurance

Enjoy reading! 

What is software testing and who is a Quality Assurance specialist

Software testing is the process when someone executes software components and elements using manual or automated tools to find an answer to the question “Does the system match expected requirements from the business and customers?” 

A Quality Assurance Specialist is a team member who checks whether the app works correctly in such a way to meet users/business requirements. 

who is a Quality Assurance specialist

Types of QA specialists: 

  • Manual (functional and GUI) – they run manual tests to identify bugs, issues, and defects in the software.
  • Automation testing – they design automated tests to check the functionality of applications. 
  • Narrowly targeted: Security testing, Performance, Usability.

Who runs tests when there are no Quality Assurance specialists. Pros and cons of every alternative

Who runs tests? Pros Cons


  • Rapid software development and delivery (competitors are terribly jealous)
  • Financial losses of the business due to software malfunctioning (for example, the downtime of web marketplace for 1 hour because of an unnoticed defect leads to more than 1000$ profit loss).
  • Loss of customer loyalty and target audience – no one wants to use and pay for software with defects.
  • Falling satisfaction/motivation of employees and the development team.
  • A bad reputation because of negative reviews from customers.

A client

  • Strong expertise in the business domain and a good awareness of required functionality because of direct participation in the development
  • Can add new Change Requests after testing
  • An hourly rate is much higher than a Quality Assurance specialist has.
  • A client should take actions that will lead to business growth, not run quality control tests.
  • Lack of opportunities for quick software testing because clients are busy with developing their businesses.
  • Little defects or inconvenient elements can be overlooked due to the lack of expertise in testing and the lack of knowledge about best practices in the field.
  • Only standard flow tests are usually carried out, not complex functional testing.

Project Manager

  • Good awareness of required functionality
  • A PM hourly rate is higher than a QA rate.
  • PM attention is taken away from his main task: setting processes and building effective teamwork.
  • Loss of motivation because testing is not a desired activity for PM.

Developers (doesn’t apply to unit testing)

  • Know the code well and what it’s supposed to do.
  • They can both check the code as developers and check the functionality as users.
  • The hourly rate of developers is higher than a Quality Assurance rate.
  • Testing performed by developers leads to the delay in bug fixes and development of new features.
  • If a developer overlooks some use-case during the development phase, most likely, it will be overlooked during testing.
  • It’s required to know and understand business requirements to test the code written by another developer. So developers who run quality control tests have to waste their time reading and acknowledging business requirements.

Why defects are almost unavoidable in the development

  • The human factors – fatigue and lack of focus
  • Overlooked conflicts in requirements
  • Every developer doesn’t consider the app as an integral system while writing the code 
  • Developers don’t use the system in such a way as a final user does
  • Developers would likely know the relationship between functional blocks they are responsible for and don’t aware of the relationship between functions in the whole system
  • Specialists can show more poor performance under deadline pressure 
  • The complexity of the system and integration – developers may check the correctness of the work of every isolated module, but don’t check end-to-end scenario where the integration between all modules are involved 
  • Defects accumulate as the product gets more complicated functionality. It requires increasing the number of regression tests
  • In cases of frequent changes in requirements, it’s easy to overlook some of them
defects in the development

Benefits a Quality Assurance specialist brings to the project: 

A trained QA specialist is always better than another type of specialist who runs quality control tests as an additional responsibility. The reason why hiring a skilled QA specialist is important is the following: 

  • Knowledge in the field of testing is deeper and richer than that of the layman. The speed of work is higher 
  • Focus on product quality with no spraying on additional activity 
  • More tech-savvy specialist with skills in:
  • the use of the test console
  • API testing
  • running specific mobile tests  

Well-known manual testing of the whole app after the development phase is not the only type of testing a Quality Assurance specialist performs. Look through the table below: 

Pros Pros What for?

Testing of requirements

  • Makes sure that requirements don’t have logic errors and inconsistencies -> fixing them during the writing of requirements is cheaper than after the development stage.
  • QA specialists can help to make more complete requirements. Their expertise allows seeing not evident scenarios that were overlooked during the requirements gathering.

Acceptance testing of new features (NFT – New Feature Testing)

  • Prevents the delivery of malfunctioning software to final users after the release of a new feature

Integration testing

  • Modules in the app are interconnected and interdependent. The implementation of a new feature can affect the work of the existing features. That leads to the necessity to check the integration of new features with existing modules.

Regression testing

  • Defect fixing can lead to software regression issues (defects in modules that have been already tested and worked well earlier).
  • Refactoring and any code changes increases the probability of software regression issues appearing.

Some principles and postulates of testing: 

  • Complete and comprehensive testing is impossible: 
  • Users and apps interact in numerous different ways. It’s impossible to test them all
  • Various mixes of runtime environments – people deal with a vast market for smartphones, browsers, and OS versions
  • The human factors – fatigue and lack of focus
  • Frequent features delivery – can affect the choice of priority areas for testing at the moment 
  • Early testing: 
  • The cost of fixing bugs in the early stages (writing and approving requirements) is less than during the testing phase 
  • Testing quality depends on conditions:
  • There is a budget and time limit
  • There is a priority for tests based on the ongoing situation, the deadlines, and the desired results  
principles in testing

QA specialists with solid experience are ready to help

If you have a problem with hiring a skilled QA specialist and you constantly find new bugs in your software, look at Sumatosoft. We stand for a professional and holistic approach to Quality Assurance and ensure that the number of bugs will be reduced to almost zero before release.

In 9 years of working on the global market, the SumatoSoft team has come to know a lot of hidden hazards in software development and testing, which allows us to develop the software in the right way with a minimum number of bugs. 

Do you want bug-free software? Contact us! 


We hope you have no doubts about why QA is important in software development. Quality Assurance specialists are vital elements of the development team. They are awesome in saving nerves, money, users’ loyalty, and reputation. Hiring a Quality Assurance specialist is an investment that will produce returns in the form of high customer satisfaction and good motivation of the development team.

Unfortunately, defects are unavoidable during app development, but QA specialists can minimize the number of issues and bugs before the app is released. And the sooner you involve a tester in the development process, the better app you get and the less money you spend. A defect that was identified at the testing phase costs much less than a defect that was found by users after the release – that is the main point why QA is important in software development! Don’t forget. 


Let’s start

You are here
1 Share your idea
2 Discuss it with our expert
3 Get an estimation of a project
4 Start the project

If you have any questions, email us [email protected]

    Please be informed that when you click the Send button Sumatosoft will process your personal data in accordance with our Privacy notice for the purpose of providing you with appropriate information. This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
    Thank you!
    Your form was successfully submitted!
    Let’s start
    You are here
    1 Share your idea
    2 Discuss it with our expert
    3 Get an estimation of a project
    4 Start the project
    If you have any questions, email us [email protected]

      Please be informed that when you click the Send button Sumatosoft will process your personal data in accordance with our Privacy notice for the purpose of providing you with appropriate information. This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
      Thank you!
      Your form was successfully submitted!