Non-functional testing of Software involves testing the Software from the requirements which are non functional in nature related but important a well such as performance, security, user interface etc. They describe how the system should work. The answer is usability. Usability is a non-functional requirement, because in its essence it doesn't specify parts of the system functionality, only how that functionality is to be perceived by the user, for instance how easy it must be to learn and how efficient it must be for carrying out user tasks. While a system can still work if NFRs are not met, it may not meet user or stakeholder expectations, or the needs of the business. If you can not measure it, you can not improve it.1 [1] Lord Kelvin (1824 - 1907) 3 SEG3101 … July 1, 2016. admin. NON-FUNCTIONAL TESTING is defined as a type of Software testing to check non-functional aspects (performance, usability, reliability, etc) of a software application. Usability: Usability which means that how easy the software performs the specific task.in other words, it shows the ability of the software to perform tasks. Of course, not all non-functional requirements end in "-ility." Non functional definition is the criteria that all product’s features should fall under. Non-functional testing is done to verify the non-functional requirement of the application like Performance, Usability, etc. Scalability: Processing throughput of batch jobs shall increase when adding CPU's; Now, let’s take a glance at popular platforms and apps to consider how their functional and non-functional requirements could be written. A Complete Guide to Non-Functional Testing: Its Purpose, Types, Tool, Test Cases with Examples. Examples include reliability, availability, portability, scalability, usability, maintainability. 10 Examples for Non-Functional Requirements. What is a Non-Functional Requirement? Important Usability Requirements Example And Tips Posted by Jessica Miller on November 27, 2013 November 25, 2013 Posted in Usability One of the primary purposes of usability requirements is often to make user know that the system is effectively and efficiently meeting the expectations of its different users with its regard of its ease to use. This free info-page provides 10 Examples of Non-Functional Requirements (NFR's). A non-functional requirement is an qualitative requirement for a product, service, system, process, document, location, infrastructure component or facility. We also have security, performance, robustness and so on. It verifies if the behavior of the system is as per the requirement or not. Time of servers and other devices shall be synchronized to a reliable reference time. Functional vs Non-functional Requirements Examples It will be more convenient to find differences between functional and non-functional requirements through real-world experiences and cases. It is further divided into performance, security, usability, compatibility as the characteristics of the software. Non-functional requirements examples. However, four examples of Non-functional requirements we are discussing here are usability, reliability, performance, supportability, and scalability. What is Non-Functional Testing? These are attributes that will help you define crucial user expectations and control product quality. Non-functional requirements define system behaviour, features, and general characteristics that affect the user experience. A usability requirement specifies how easy the system must be to use. If you think of functional requirements as those that define what a system is supposed to do, non functional requirements (NFRs) define constraints which affect how the system should do it.. Non-Functional Requirements SEG3101 (Fall 2010) 2 SEG3101 (Fall 2010). As you can see from that list, non-functional requirements are often referred to as "-ilities." 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