1. Modeling Architectures

2. Analyze and Predict Performance Availability Queuing
Back of the envelope calculations
Computation budget allocation
Simulation
Availability
Failure rate and recovery time

3. Other Attributes – less well measured
Modifiability
Coupling and cohesion metrics
Still requires empirical experience
Testability
Component interaction metrics
Coverage measures in development phase

4. Prototyping and Development
Prototypes can be used for evaluation
During development – test early and often
Skeleton systems

5. What you can’t measure, you can’t control