Software Requirements are Descriptions and specifications of a system-A requirementis a condition or capability to which the system must conform and Define. A system is designed with certain functionality in mind and to ome up with that functionality and its specification right at the beginning is Requirement Engineering. Requirements Engineering-Eliciting, organizing, and documenting the requirements of the system-The process of establishing the services that the customer requires from a system and the constraints under which it operates and is developed Software requirements should be:

★ Clear

★ complete

★ Unambiguous

★ Quantitative