Case Study: Architecture-Level Development of a Pulse-Doppler Radar System

Bottom-Up System Synthesis Enabled by Reusable Component-Specifications System cost is proportional to power requirements, antenna gain, signal processors ... Reusable components improve economics of system development. Figure 1. System Synthesis Enabled by Reusable System-Component Specifications. Generation and Evaluation of Design Alternatives Design Alternative Subsystems Measures of Effectiveness Receiver Transmitter .... .... Cost Performance Reliability Alternative 1 R1 T1 .. .. $7,500,000 P1 0.98 Alternative 2 R2 T1 .. .. $7,800,000 P2 0.985 Alternative 3 R3 T1 .. .. $7,850,000 P3 0.975 Alternative 4 R2 T2 .. .. $7,500,000 P1 0.999 Alternative 5 R2 T3 .. .. $7,000,000 P5 0.85 Alternative 6 R3 T5 .. .. $8,050,000 P6 0.975 Clearly, design alternative 1 is inferior to design alternative 4. Design alternative 6 is infeasible because it exceeds the cost constraint. Research and Development We need a formal language to describe system assemblies. We will start with a system-port model for the architecture-level description of modules. We need templates for structuring/writing requiremnts and specifications in a way enables parsing and interpretation of their content. What role can UML and XML and RDF play?

Section 3-2: June, 2003.