The 4 Ps of Marketing and 13 Aspects of a Good Requirement

Just as marketing has 4 Ps: Product, Promotion, Place and Price

Requirements have 13 attributes:
1. Describe what and not how
2. Atomic
3. Unique
4. Documented
5. Identifies owner
6. Traceable
7. Necessary
8. Complete
9. Unambiguous
10. Identifies applicable states
11. Testable and quantitative
12. Not a constraint
13. Not a goal

Rule of thumb: A requirement should be satisfied by only 1 design component, it not feasible then it should be broken down further.