What is an example of a non-functional requirement in software criteria?

A non-functional requirement refers to criteria that specify how a system performs a particular function rather than what function it performs. Non-functional requirements encompass aspects such as performance, usability, reliability, and security.

Usability standards, which encompass user experience and accessibility, ensure that a software application is user-friendly and meets the needs and expectations of its users. This includes considerations like ease of use, learnability, and how well the software supports users in accomplishing their tasks. These factors are critical in determining the overall effectiveness of the software in real-world environments.

In contrast, authentication methods, database management functions, and transaction tracking mechanisms are primarily functional requirements. They describe specific behaviors and capabilities of the system, outlining what the system should be able to do in terms of features and operations. Therefore, the emphasis of usability standards aligns perfectly with the essence of non-functional requirements, focusing on the quality and experience of using the software.