Architectural Adaptation Addressing the Criteria of Multiple Quality Attributes in Mission-Critical Systems

Mission-critical software claims safe and robust adaptations that comply with rigorous criteria of multiple critical quality attributes. Existing adaptation approaches pay little attention to comprehensively capture mission goals and explicitly specify adaptation requirements. We propose an approach to using scenario-based analysis to elicit and specify the criteria of multiple quality attributes as adaptation invariants, and design corresponding architecture variants as facilities implementing adaptations. We also present how to make adaptation decisions at runtime.