1.Developers and testers are already working in it every day. And Jira can be used for requirements management.

2.Requirements engineering tools are usually software products to ease the RE processes and allow for more systematic and formalized handling of requirements, change management and traceability.

3.Requirements fall into three categories: business, user and software. See examples of each one, as well as what constitutes functional and nonfunctional kinds of software requirements. A comprehensive set of requirements is crucial for any software project