As services are identified during SOA analysis and design, both functional and non-functional requirements are collected in order to define a service level agreement for each service.
在SOA分析和设计期间识别服务时，会同时收集功能性和非功能性需求，以便定义每个服务的服务水平协议。
Service Level Agreement (SLA) -- Provides a formal specification of the dependencies that a particular Service Version may have on other defined services.
服务级别协议（Service Level Agreement，SLA）— 对特定服务版本可能在其他已定义服务上含有的依赖项提供正式规范。
To enforce SLA(Service Level Agreement) management, SLA metrics for network services or application services must be established in advance.
确定各种网络服务或应用服务的SLA（服务等级协约）参数是实施SLA管理的前提之一。
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