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Three NFR Categories
publish date: 2026/06/06 23:20:6.783027 UTC
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The three main categories of non-functional requirements are:
Correct Answer
Product, Organizational, External
Explanation
Non-functional requirements are classified into three categories: Product requirements (constrain the software behavior itself — speed, reliability, security, usability), Organizational requirements (from organizational policies and procedures), and External requirements (from factors outside the system — regulations, legislation, ethics).
Reference
Software Engineering, Ian Sommerville, 9th edition