Drawing A Line Between Functional Testing and System Testing

by Ray Parker Marketing Consultant

Software testing and quality assurance (QA) are a major part of the software development lifecycle. Testing has a vast scope and there are different types of testing that almost all testers are aware of. Most of the testers may be familiar with these testing types but not experts in conducting them. Functional testing is a type of testing that is performed to check that the functionality of an app is working as expected. It is important to define if the system is working as it is expected to.

Choosing the Right Testing Company

With a myriad of functional testing companies in the market, it becomes complex for organizations to pick one according to their business requirements. However, it is imperative to make the right choice, as the future of business success greatly depends on the testing company. Functional testing is a type of testing to ensure that all features and modules of an app are working fine. It does not focus on the source code of the app instead, it tests the outcome of the source code. 

How System Testing is Important and Different from Functional Testing?

System testing is a testing process that checks the performance, usability, and reliability of applications. It is used to evaluate the readiness of an app which cannot be addressed by functional testing processes. When compared with functional testing, system testing is complex too. 

Let’s discuss how functional and system testing are entirely different and important in their own roles:


Functional testing is usually executed before implementing the system testing. The output of these test cases is known in advance and then checked by the expected output. However, system testing is carried out after the implementation of functional testing. Once the functions of the app are working efficiently, it is time to check the system performance. The real-time data user activities work as the input data and the result consists of all the bugs while using the app. 


The basic purpose of using functional testing is to validate the behavior of the app. Whereas, system testing checks the performance of the software app. This testing type includes load, stress, speed testing, etc. 


Since both types of testing are conducted at different levels in the software development lifecycle, they both focus on the customers. Functional testing pays attention to what the customer requires. While system testing emphasizes on achieving customer expectations. 

Manual Testing Solutions:

Both testing processes have their own complexity, but functional testing is easy to implement. No extra inputs are required for testing. When talking about system testing, to check the performance of an app it is important to collect data inputs for implementing the right testing procedures. 


We can conclude that both, functional testing and system testing are important in the software development process. Both of the testing processes cannot be skipped or missed. These testing types are designed to meet and exceed customer requirements and expectations.

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About Ray Parker Freshman   Marketing Consultant

12 connections, 0 recommendations, 45 honor points.
Joined APSense since, February 18th, 2019, From New York, United States.

Created on Aug 29th 2019 02:47. Viewed 351 times.


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