Importance of Non Functional Testing Techniques

Posted By : Nunna Charan | 29-Apr-2021

Non-functional testing is used to check the Reliability, Usability, Performance, and Adaptability of Software applications among various environments. Non Functional testing is designed to check the readiness of the System as per the parameters. Non-functional testing is important with regards to functional testing.

Objectives of Non-Functional Testing :

1. Non-functional testing will help to increase the usability, maintainability, and portability of the application.

2. it helps to reduce the production cost and risk associated with the Non-functional aspects.

3. It improves and enhances the application behavior and technologies 

Advantages of Non-Functional Testing :

1. Non Functional testing ensures that the application run efficiently and will be reliable enough

2. Non Functional testing covers all the other aspects which cannot be covered in the Functional Testing

3. Non Functional testing ensures the security of the software application

Parameters in Non-Functional Testing :

Security: The purpose of the security Testing is to identify all possible loopholes and weaknesses of the Software system which might result in the loss of information at the hands of the employees or outsiders of the organization.

Reliability: The reliability testing is to check whether the application can perform a failure-free operation for a specified time period in a given environment. the word reliability means "yielding the same ", which means something is dependable and gives the same outcome every time.

Availability: Availability can be checked by stability testing. Its purpose is to check if the software application fails over normal usage at any point of time with its full range of use. stability testing is also referred to as Load or Endurance testing

Usability: Usability testing is also known as User Experience (UX) testing. It is a testing method for measuring how easy and user-friendly a software application is developed. Usability testing mainly focuses on the user's ease of using an application, Flexibility of application to handle controls, and ability of applications to meet objectives.

Scalability: Scalability testing also refers to performance testing. it is a testing method that measures the performance of a system or network when the number of user requests is scaled up or down. it will test the system's abilities to meet the growing needs and ensure the performance in the increased user traffic.

Efficiency: The extent to which any software system can handle the quantity, capacity, and response time.

Reusability: Any portion of the software application that can be converted and can be used in another application

Non Functional Testing Types:

Performance Testing: It is used to evaluate the overall performance of the application by giving an expected response. it can be conducted as a part of integration testing and system testing

Load Testing: Load testing is to validate the system whether it performs as expected when concurrent users access the application and get the expected response time. the test should be conducted on the dedicated server which stimulates the actual environment

Stress Testing: Stress testing is done to check and evaluate whether the system performance is as expected when it is low on resources. multiple clients will be connected to the servers with different workloads. 

Volume Testing:  The behavior of the application is evaluated when there is a large volume of data is involved. when the software is subject to large amounts of data, checks the limits where the software fails.

User Interface Testing: It is evaluating the GUI( Graphical User Interface). it is used to check if the data is traversed correctly from one page to another, consistent with its look, Gui should provide help and tooltips to make it easy to use.

Compatibility Testing: It is used to test whether the application is compatible with other Hardware/Software with Minimum and Maximum configuration. Test each hardware with minimum and maximum configuration

Recovery Testing: Evaluates that the application terminates gracefully in case of any failures and the data is recovered appropriately from any hardware and software failures.

Failover Testing: Failover testing is done in order to verify that in case of a system failure the system is capable enough to handle extra resources like servers.

Security Testing: Security testing is done to ensure that the application has no loopholes which could lead to loss of data or threats. It is one of the important aspects of Non Functional testing it can lead to Security threats if not performed properly.

Scalability Testing: Scalability testing is done to verify if the application is capable enough to handle increased traffic, number of transactions,data volumes, etc. the system should work as expected when the volume of data or change in the size of data is done.

Compliance Testing: Compliance testing is done to check if the defined standards are being Followed or Not. To further verify it, audits are also done.

Endurance Testing: Endurance testing is done to verify the System's behavior when a load is increased to an extent for a specific period of time.

Reliability Testing: Reliability testing is done to verify if the application is reliable and is tested for a given time in the defined environment. An application should give the same output as expected Every time, only then it can be considered as reliable.

Efficiency Testing: Efficiency testing is done to verify if the application works efficiently and the number of resources required, tools required, complexity, customer requirement, etc. They help to define how an application would work efficiently if all the considered parameters work normally.

Disaster Recovery Testing: It is done to check the success rate of recovery of the system if any failure happens and whether the system is able to restore the data.

Maintainability Testing: The maintenance testing team is available to test the new enhancements required by the client after the application is live or issues reported by the client in the live environment. 

Non Functional Test Tools : 

1. Load runner

2. Jmeter

3. Loadster

4. Load storm

5. Neoload

6. Forecast

7. Load Tracer

8. Load Complete



About Author

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Nunna Charan

He is a QA Engineer and has good knowledge in manual testing and always eager to learn new things. He is dedicated towards his work.

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