Principle 4:No Single Model Is Sufficient No single model is sufficient.Every non-trivial system is best approached through a small set of nearly independent models. Create models that can be built and studied separately, but are still interrelated. LogicalView Implementation View Analysts/Designers 吴 End-user Programmers Structure Functionality Software management Use-Case View Process View Deployment View System integrators System engineering Performance System topology scalability delivery,installation throughput communication Object Oriented Analysis and Design 11Object Oriented Analysis and Design 11 Principle 4: No Single Model Is Sufficient  No single model is sufficient. Every non-trivial system is best approached through a small set of nearly independent models. ▪ Create models that can be built and studied separately, but are still interrelated. Process View Deployment View Logical View Use-Case View Implementation View End-user Functionality Programmers Software management Performance scalability throughput System integrators System topology delivery, installation communication System engineering Analysts/Designers Structure