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Companies face complex challenges in creating and maintaining the embedded software needed to support a rapidly expanding product line portfolio. To better address this challenge, the IBM Rational® Rhapsody® and BigLever Software™ Gears Bridge solution is a convergence of synergistic MDD and SPL technologies. Compared to conventional hand-coding approaches, SysML and UML® provides a powerful enabler for the rapid development of individual products within a product line as well as better abstraction and visualization for the maintenance and evolution of those products over time. SPL engineering methods and tools are specifically designed to provide the essential capabilities of expressing, encapsulating, and managing the feature diversity within a product line portfolio.