Why Is Testing Important in Software Development?

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Software testing is the process of verifying and then confirming whether a software application or product performs as expected or not. Testing has its own set of advantages like bug prevention, lower costs of development, and comparatively better performance.

The software cannot be said to be bug-free from the start. Therefore, software developers might strive to write code that will reduce the number and severity of flaws that are already there. However, the majority of bugs are latent and only emerge when the conditions are right.

Prior to the implementation of the application, the testing process verifies that there are no errors or gaps or that the results obtained are in agreement with the expected results.

The untested software harms the client’s business and causes a significant loss. The loss is directly inversely proportional to the time taken to find the bugs. Testing is therefore essential to the Software Development Life Cycle (SDLC). Reduced costs, particularly over the long term, are the testing’s primary and most significant advantage. It would be cost-effective to hire a group of experts to test the programme right away, at the early stages of development.


Software Testing is a procedure that aids in finding mistakes, bugs, or flaws in a piece of software. Additionally, it checks to see if the programme complies with the demands made by the client or customer. Tests are only one type of measurement to make sure that website content is working as intended. Aside from adequate tests, there are other considerations for testing, other useful thoughts you can think of and notice about, that should be considered before starting the process.

In addition to listing the disadvantages of software testing, let’s have a look at some of the most popular ones:


  • Increases the software’s effectiveness.
  • Helps to lessen the frequency of programme repairs.
  • Eliminates software flaws, failures, and bugs.
  • By identifying their errors, the testing team can help the software development team.
  • Enhances the software’s quality.
  • Prevent future issues, crashes, and end-user complaints.
  • Uses automated testing to speed up test execution.
  • Improves user experience and customer happiness.
  • A programming language is not necessary for manual testing.
  • Aids in code optimization and eliminates unnecessary lines of code.
  • Several systems could apply written test cases and test scenarios for applications.


A simple application might be put through a lot of different tests. A test management plan aids in prioritizing which testing kinds, given the time and resources at hand, are most valuable. By using the fewest possible tests to identify the greatest possible number of flaws, testing efficacy is maximized. There are three broad groups into which we might divide different testing approaches. As follows:

  • Maintenance Testing
  • Functional Testing
  • Non-Functional Testing

Maintenance Testing:

After the software is put into production, maintenance tests are conducted. This approach to software testing occasionally finds and fixes issues. In maintenance testing, there are four different types of testing. It comprises several different types of testing, such as:

  • Adaptive Testing
  • Corrective Testing
  • Perfective Testing
  • Preventive Testing

Functional Testing

Functional testing helps us make sure that each application’s functionality works as intended and satisfies the requirements. There are various methods of functional testing, as follows:

  • Integration Testing
  • Unit Testing
  • Acceptance Testing
  • Smoke Testing
  • Regression Testing
  • System Testing
  • Non-Functional Testing

Functional and non-functional testing are both essential. It helps us to confirm the non-functional characteristics of a software application, such as performance, usability, dependability, etc. In other words, it assesses an application’s readiness regarding non-functional criteria that are not covered by functional testing.

Non-functional testing includes the following forms of testing:

  • Compatibility Testing
  • Security Testing
  • Recovery Testing
  • Performance Testing
  • Usability Testing


Few would argue the topic of the necessity of quality control when developing any kind of application or software. A brand’s reputation can be tarnished by late deliveries or unknown flaws in the software, which can result in losing out a handful of customers. In extreme circumstances, a bug or flaw can harm all the connected systems or lead to some significant problems.

Consider the case of Starbucks to grasp the significance of software testing. When the company’s point-of-sale (POS) platform crashed in 2015 due to a defective system refresh brought on by a software bug, millions of dollars in sales were lost. If the POS software had been fully tested, this might have been prevented.

Another illustration is Nissan, which had to recall over 1 million vehicles because the airbag sensor detectors’ software was flawed. Or a software flaw that prevented a military satellite launch worth USD 1.2 billion from succeeding. 2 The data speaks for itself. In the US, software errors cost the economy 1.1 trillion dollars in assets in 2016. Additionally, they affected 4.4 billion customers.

Early software testing showcases all the hidden issues of the software before it is launched in the market for public use. Development teams can solve issues like scalability, security, architecture, and invalid functionality as soon as they receive test results.

Therefore, while you are counting and mending the trees, you might not notice the issue that the forest as a whole might provide. A software programme may generate major faults that you may not have anticipated when you are trying to correct the tiny ones. That is precisely why you should emphasize the value of testing in the SDLC at each level.

Software testing techniques are used in application development for the reasons listed below:

A) Improves the Overall Quality of Software

Delivering a great product is a crucial factor to take into account when assessing customer attraction. Once the product is thoroughly checked before release, then only it can deliver the expected results. Program testing and quality assurance services are very helpful for ensuring that your software is compatible. The possibility of coding flaws exists even after thorough testing by your software developer. A skilled and knowledgeable software tester can uncover these concealed problems to ensure that your finished product is error-free. A software tester can also make sure the programme operates as intended, whether it is used by one user or a hundred.

Software testing, therefore, aids in quality assurance (QA) and ensures that the product meets the requirements and specifications set forth by the users.

B) Maintain Reputation

Software engineers frequently fail to catch errors in their code. If the correct way of software testing is not done thoroughly, there is a danger that the client will receive the wrong product. This will have significant consequences since the client, or even worse, his clients may discover the faults when he/she uses it.

Making mistakes now will reflect poorly on you and result in losses for your customer. It is advisable to properly test the software with all conceivable permutations and combinations of input values and scenarios to detect any potential infinite loops, errors, etc., saving you both from financial loss as well as a dent in goodwill.

C) Facilitates Early Detection of Problems

Complex application development might be prone to mistakes. Software testing is essential because it finds errors in the written code that may be accurate before the software product is delivered.

D) Aid you in Completing Your Product

Even when a provider of software development services makes an effort to create the programme by the requirements the client shares with them, the finished output may occasionally deviate slightly from the client’s expectations. In these situations, testing can ensure that all the features and functionality are present and functioning as intended before handing over the software. To ensure that the programme is error-free and performs as expected in diverse scenarios, multiple testing principles are utilized.

E) Improves Pleasure and Trust Factor of Clients

Customer trust and happiness are increased during all stages of a product’s development lifecycle thanks to testing, which reveals both the product’s strengths and weaknesses. When buyers purchase a product, it has already undergone extensive testing and has proven to be of high quality.

F) Reduces Costs

Software testing can cost firms more money in the long run. Finding things left out during the development process is quite common. Because software patching is typically more expensive than testing during the development stages, it might be more difficult to identify and fix problems once the application has launched.

G) Make Sure Your Software is Secure and Portable

A developer may create software that runs smoothly on a single platform but creating software that is compatible with multiple systems requires extensive knowledge and skill. After development, you may test the code rigorously on many platforms to make sure it is genuinely portable and performs equally well across them all. Since each platform operates differently and a software tester must ensure that the programme keeps the data secure on all platforms, it is crucial to pay special attention to data security.

H) Identify Security Flaws of the Software

Attackers may be able to take advantage of vulnerabilities left by insecure application code. Since most apps are now online, they are increasingly useful targets for cyberattacks. The apps should be tested throughout the application development process, and they should be more carefully examined if they are downloaded from debut on the country’s app store.

A cross-site scripting attack occurs when a web application that is published by a business is successfully used to deliver malicious code, which cannot be detected by software anti-virus programmes. As a result, the code is at risk delivered by poor web pages, something the developers avoided by making certain safeguards.


The above points signifies the importance of conducting testing of the software to ensure the desired results. Therefore, ensure you continually practice the Right Pitch. One of the most productive routines is to set a time period. Typically, I will have time freed up in the evenings when reasonable. So on the weekends and during this period I know I have the advantage of being available. However, before releasing the software applications to the public you always want to thoroughly test them.


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