What are the broad categories of system requirements?

·         High risk and uncertainty.

·         Not a good model for complex and object-oriented projects.

·         Poor model for long and ongoing projects.

·         Not suitable for the projects where requirements are at a moderate to high risk of changing.

·         Once an application is in the testing stage, it is difficult to go back and change a functionality.

·         No working software is produced until late during the life cycle.