System Architecture>Design Conceptual CDR Modeling Optimization “Optimal" metric 1 Design Decision Making Need Qualitative◆ Quantitative→ PDR 长X SRR Design Modeling m Optimization Concept Concept Concept System Synthesis Screening Selection Design variable X1 System Architecture System Design CLGO System Engineering by J.J.Gao 5+ - System Engineering by J. J. Gao 5 Decision Making in System Design