Inadequate management may mean that testers don’t have the proper resources to carry out testing thoroughly or that testers aren’t given sufficient time to test each aspect of the build. Tsung is an open-source tool that allows users to carry out high-volume load testing across multiple protocols and servers including HTTP and SOAP. The ZAPTEST FREE edition is just a pared-down version of the enterprise edition, offering many of the same functionalities on a smaller scale.

definition of non-functional testing

Figure 3 shows a relatively comprehensive list of NFR sources to consider during development. Baseline or Benchmark Testing refers to setting a standard for any new application under test. For instance, an application may be able to handle a load of 100,000 users in its first round of testing, which then becomes a benchmark for future testing. Stress Testing evaluates the performance of applications in crunch situations, e.g., under low memory/hard disk space conditions. In such environments, it is possible to detect defects that would not have been discovered in normal situations. It evaluates the most basic elements or components of a software program—the smallest chunks of code that can be tested.


Functional testing tests the functions of the application and checks whether they work as expected. Non-functional testing tests other aspects of the application that affect user satisfaction and application quality. Test implementation is an incredibly critical factor in the software development process, from being a component of all tests to recognizing multiple defects, bugs, and problems within the scheme.

  • Loadrunner is a set of tools that help you run performance tests smoothly.
  • You run these tests to determine the threshold at which the software fails and what happens when it fails.
  • The team emphasizes testing applications using different testing technologies after the completion of the development process.
  • With the help of unit testing, a QA engineer can get as precise as possible when testing a newly created or recently updated software product.
  • You can use volume tests to check if there’s any data loss, warning or error messages, or data storage issues when massive amounts of data are added to the product.

Issues regarding security vulnerabilities may not be detected while taking in the perspective of common users. Software is everywhere around us, and it’s essential for your testing team to be familiar with all the various types and platforms software can come with. In 21+ years, our QA team has tested every type of software there is, and here are some of their specialties. Having one outside team deal with every aspect of quality assurance on your software project saves you time and money on creating an in-house QA department. We have dedicated testing engineers with years of experience, and here is what they can help you with. The choice of a QA team is one of the most crucial aspects of setting up a new testing project, and that also includes its cost.

Characteristics and Attributes of Non-Functional Testing

Non-functional testing is carried out during the system testing phase of software testing after unit testing and integration testing have taken place. Examples of non-functional testing include testing designed to assess capacity, performance, usability, recovery, and portability. The team focuses on testing software through different software testing technology after the software development process has been completed.

definition of non-functional testing

Its proprietary comparison algorithm is designed to reduce false positives compared to conventional pixel-perfect comparison algorithms. Assess the application’s ability to take the lowest possible time to perform key functions. Each system in the lab has a testable application version to be published, and a test set is carried out. Configuration testing is a unique type of software testing that is conducted in laboratories.

How testing in the cloud delivers value to development teams

Volume testing serves to verify what happens to system performance when a huge volume of data is added to the database. This is done to identify what problems may occur with increasing volumes of data. These tests can find issues in software design and architecture performance.

definition of non-functional testing

The two testing methods should be conducted and evaluated independently, to ensure that all vulnerabilities are found, and a high-quality product can be offered. In our 20+ years of experience as a software testing company, we begin every testing project by reviewing the documentation that came along with the code. The documentation alone should tell us enough to help us design the testing process correctly and make sure that it’s not missing anything important. WebLoad Professional is a performance and load testing solution to scale your business. It provides reliable and fast performance testing to achieve large-scale usage, accelerate growth, increase user acceptance and unpleasant surprises.

What is functional testing?

Testers confirm that users can log on to an app and retrieve their details with no failures. Functional testing is most often used to catch bugs or edge cases in a digital product. It is useful to have an independent test team so that assumptions and biases are not passed on. Functional testing is a largely black-box exercise where outputs are confirmed as correct or identified as incorrect given the inputs provided. There is little attention paid to underlying processes — only to whether the outputs match the requirements. Five variables guide economic trade-off decisions for NFRsNFRs may require additional work, either now or in the future.

definition of non-functional testing

Rather than testing their functionality, which is what functional testing does, performance tests may test response times, bottlenecks, and failure points. Performance testing helps testers to ensure that software is of high quality and that it is fast, stable, and reliable. In the field of software testing, an assessment under the banner of performance testing is one of the main elements which ensures the effective operation of a product after its launch. Non-functional testing is testing designed to check a software application’s non-functional aspects such as performance, reliability, utility, etc. In addition, this testing is designed to test a system’s readiness related to non-functional parameters typically never addressed by the functional testing process. Non-functional testing is the type of software testing that test the non-functional parameters of the software.

Automated non-functional testing: Benefits, challenges, and processes

Non-Functional testing is mostly performed after compilation of code. Functional testing generally gets performed before compilation what is non-functional testing of code. Read this article to learn more about functional and non-functional testing and how they are different from each other.

Beta Testing Examples, Benefits and Challenges – ARC

Beta Testing Examples, Benefits and Challenges.

Posted: Tue, 14 Feb 2023 08:00:00 GMT [source]

Makes sure that bug fixes or new functionality react as expected within the system. Nonfunctional requirements can have a substantial impact on solution development and testing. As such, Architects and developers should use caution when specifying them. NFRs are often architecturally significant requirements that describe the system’s various quality attributes (‘ilities’). They are as critical or even more critical than functional requirements that pass through the backlog. Working with Product and Solution Management and the teams, System and Solution Architects are often responsible for identifying and establishing NFRs.


Both are equally critical when it comes to meeting the end-users’ requirements. While Functional Testing looks at all the behavioral aspects of the application, non functional Testing ensures the correct performance in a range of usage conditions. Rather than test against functional requirements, testers could opt to test by how they expect the application to function. For example, I’d expect to see an account balance increase if I add funds, and decrease if I remove funds.