1. SECM - Requirements Concepts Reston Review
SysML v2 Reqts WG
23 Mar2017
S. Friedenthal

2. Requirements Decomposition Concept
Requirements groups compose zero or more requirements and/or zero or more requirements groups
Requirements do not compose other requirements
Each requirement in a requirement group further constrains the design space
There can be logical combinations of requirements in a requirement group (e.g., Group 1.1 = R3.1 or R3.2)

3. Decompose a Compound Text Based Requirement Example

4. Requirements Form a Constraint Boundary Adding Constraints to a Reqt Group
Acceptable Design
< Constraint 1
< Constraint 2
> Constraint 3
Constraints can span
N dimensional space

5. Vehicle Weight Performance Requirement Example

6. Vehicle Stopping Distance Example

7. Requirement Concepts

8. Requirements Attribute Concepts

9. Requirement Relationship Concepts Diagram

10. Restricted Text Statement Metamodel Example

11. 6.5.2.6 Requirement Concepts Requirements

12. 6.5.2.6 Requirement Concepts Requirements

13. 6.5.2.6 Requirement Concepts Requirements

14. 6.5.2.7 Verification Integration Concepts Requirements