SysML Model Elements

SysML Model Elements⌘

Comment⌘

• Comments can be associated with any model element and are quite useful as an informal means of documenting the model.
• SysML has introduced extensions to a comment called: Rationale, Problem and ElementGroup

Problem and Rationale⌘

• A Rationale is used to facilitate the system modeler in capturing decisions.
• The rationale may be attached to any entity, such as a system element (block), or to any relationship, such as the satisfy relationship between a design element and a requirement.
• A Problem documents a deficiency, limitation, or failure of one or more model elements to satisfy a requirement or need, or other undesired outcome. It may be used to capture problems identified during analysis, design, verification, or manufacture and associate the problem with the relevant model elements.

Problem and Rationale example⌘

Constraint⌘

• Constraints are used to capture simple constraints associated with one or more model elements