8 Reasons Why Manual Testing is Important and Can Never Be Replaced

It is an undeniable fact that automation testing has greatly improved the efficiency of the software testing process. But this does not mean that automation testing alone is sufficient to achieve maximum quality. Although we are a top-tier automation testing company, we are also experts in providing the best manual testing services because we believe manual testing can never be replaced. We feel that understanding this fact plays a huge role in helping us provide comprehensive software testing solutions to our clients. If you feel otherwise, we believe we can have you cross the aisle by the time you finish reading this blog. If you already think manual testing is important, great. We’ll go straight ahead and explore the various factors that explain why manual testing is so important.

The 8 reasons why manual testing is important

  • 100% automation is not possible
  • There is scope for success and failure
  • human touch
  • Automation is not easy
  • Automation is not cheap
  • Repetition is not the only ruling factor
  • It’s hard to keep up with changes
  • Automation is not the purpose of testing

100% automation is not possible

Right out of the gate, we want to prove the fact that not all testing can be automated according to needs. Even before analyzing whether it is wise to use automation or not, one must consider whether it is possible to automate the test. For example, mobile app test cases can be very complex. Even the smallest issues like excessive touch inputs or an incoming call can disrupt your app’s performance. If you’re testing an infotainment system that relies on external devices to be connected, you won’t be able to automate that either.

The biggest hurdle will be compatibility across different devices. You can use a tool like Selenium to test your web application in different browsers, but you can’t be sure if your web pages are rendering correctly according to your design. That’s why your goal shouldn’t just be to pass the automation test.

What is behind success and failure?

Let’s say you can automate most of the tests. Should you do it? Just because you can automate it doesn’t mean you have to implement it right away. We all know that one of the principles of software testing is that “no errors is wrong”. Likewise, just because you pass the automation test, it doesn’t mean there are no issues. As of now, there is no alternative to manually testing the user experience.

Regardless, the function may work and still not work or function effectively. If you check if all the buttons on a webpage are working, the automation script will pass if it simply works. But what if the button is not in a comfortable position that the user can click easily? Or what if the button color doesn’t make it easily visible because it blends in with the background? The results are no longer significant in such scenarios. Even integration and localization problems will easily go off the radar if you rely solely on automated tests. Since user experience is a very important criterion that influences the success factor of products, you cannot simply ignore the human touch that manual testing provides.

human touch

If apps only contain the bugs we expect, software testing becomes very easy. If you have been a software tester for at least a short period of time, you will know that errors tend to appear in the most unexpected ways. Yes, technologies like artificial intelligence and machine learning have made automation more effective over the years. But overcoming the analytical thinking of the human mind, subject matter expertise, and strategizing will be very difficult. This is why techniques like heuristics testing are so important in spotting errors that cannot be easily detected.

Exploratory testing in an Agile environment is also important because it will help you better understand the product through the high-quality data you collect from it. So you will be able to keep up with the ever-changing requirements that come in Agile. Even if you are not in an agile environment, manual testing will definitely help you understand the product better. But you have to make sure you test it from the user’s perspective and not just from the motivation to run the tests.

Automation is not easy

You also have to understand that automation testing is no picnic. You need to be smart enough to use it effectively by following various automation testing best practices and tips. Without the right employees who are able to handle automation and the right tools that you must know to use them well, achieving effective automation can become very difficult. So if you start without proper planning and start falling behind in every sprint, automation testing will soon start to become a nightmare for you.

Automation is not cheap

Sometimes the cost of something can outweigh the benefits it brings to the table. Likewise, automation on a large scale would be ideal as it would be better to get a return on your investment. But what if you have a small project on hand? Your chances of getting a return on your investment will be minimal. The automation is not done by just writing the scripts in the beginning, you have to maintain it as well.

So a concept called “three wire testing” can be used to get the best ROI in automation testing. Tripwire testing is only using the fewest number of automated tests that will be required for testers to find out where they can find critical errors in the system.

repetition factor

Even if you have to perform tests such as smoke tests on a large-scale project, you would be wise to automate these tests. If the tests were not repetitive in nature, then automation would not make much financial sense. Likewise, if there are any errors detected after the release, manual testing can be used to quickly reproduce the issue and generate a bug report. You can’t sit back and write an automation script for such simple demands.

Although repetition is important, it is not the only factor as differences are also a major aspect. Like how Albert Einstein said that “insanity does the same thing over and over again and expects different results.” You cannot keep repeating the tests over and over.

It’s hard to keep up with changes

If you work in an agile environment, it is very difficult to keep up with various changes that may affect the user interface, features or product flow. Each change will mean that you will have to make changes or even rewrite the automation scripts. Testing in the early stages of software development can certainly help us to detect and solve problems in the early stages easily. But this is the stage of the software development lifecycle where continuous changes continue. Updating your automation software for each change will become a cumbersome task that will not save you much use because early stage scripts do not last long.

Automation is not the purpose

Now you will understand that automating your tests is not the purpose of testing. So, if you get stuck too much in automating your tests even though it won’t be financially viable or good for your product, you’ll be able to focus on delivering quality. There is a lot more to testing than just spotting bugs or passing tests for that matter. You should never lose sight of the big picture while striving to automate your tests.

Just because one ingredient makes a dish really taste good doesn’t mean you have to use only that ingredient and leave out the others that are needed. Since both manual and automated testing are obviously important components that are necessary to achieve quality, you must understand that the purpose of automation should not be simply to make it mimic human behaviour. As mentioned earlier, the purpose of automation should be to improve the overall product quality. Focus on aspects like quality assurance based on what you’ve learned with the help of manual testing to make a much bigger impact.


It can be very easy to forget that software testing is a process of discovery and focus only on automation. Instead, automation should be used to quickly repeat everything we know so that we have enough time and resources to discover what we don’t know. Manual testing is one of the best ways to explore unknowns. So as one of the The best quality assurance companiesWe are confident that manual testing won’t stop soon. We started out by saying that 100% automation is not possible and we want to make sure you don’t take it the wrong way and pull out of automation once there is a challenge. So it would be better to look at it from a different perspective and go ahead by saying that 100% of the tests that should be automated for maximum quality, should definitely be automated.

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