Melody™ R3 brings significant power to SysML parametric execution for IBM Rational Rhaposody, enabling system engineers to execute a wider range of SysML parametric models, especially those involving complex aggregate relationships, nested part/reference/shared properties, and inheritance. Users have complete flexibility in creating custom packaging structures, reusing SysML blocks and constraint blocks, and performing incremental testing and verification. Automated instance model and diagram generation allows system engineers to quickly develop topologically variant system alternatives and perform trade studies. Melody™ R3 provides model validation and debugging utilities such as warning users of parametric relationships involving incompatible value/data types. Melody™ R3 requires Rhapsody 7.5.2 and is available in 2 editions – Standard and Pro.