strong>Capabilities Capabilities = Non-Functional System Requirements
? Availability: service is accessible
? Reliability: consistency of application and transactions
? Capacity: can serve # users
? Extensibility: can add functionality
? Flexibility: can support changes
? Performance: good response time
? Scalability: can support increased load
能力=非功能性的系统要求
可用性：服务容易接受的
可靠性:保持一致的应用和事务
生产量：可以同时服务的用户
可扩展性：可以添加功能
灵活性：可以支持变化
性能：良好的反应时间
可测量性：可支持增加的负载
