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

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)

Decompose a Compound Text Based Requirement Example

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

Vehicle Weight Performance Requirement Example

Vehicle Stopping Distance Example

Requirement Concepts

Requirements Attribute Concepts

Requirement Relationship Concepts Diagram

Restricted Text Statement Metamodel Example

6.5.2.6 Requirement Concepts Requirements

6.5.2.6 Requirement Concepts Requirements

6.5.2.6 Requirement Concepts Requirements

6.5.2.7 Verification Integration Concepts Requirements