Software complexity may be reduced and productivity may be increased by the synergy of Component-Based Software Product Line (SPL) Engineering. When applied to Distributed Real-time and Embedded (DRE) systems, these technologies must fulfill systems time- critical missions and numerous functional and Quality of Service (QoS) requirements. New critical challenges to be solved are QoS sensitivity that influences functional validity and performance quality, tangled requirements that increase the complexity of requirements evaluation and abundant unsatisfactory design artifacts that...