MTBF quite commonly appears as a non-functional requirement.
MTBF 通常作为非功能需求出现。
For instance, consider a non-functional requirement that specifies some set of platforms to be supported.
例如，考虑一个指定某个需要支持的平台组合的非功能需求。
The non-functional requirement of the system, such as performance scalability, interoperability can be used to determine which patterns are to be used.
系统的非功能需求(如性能可伸缩性、互操作性)可以用于确定要使用哪个模式。
Each project brings its functional and non functional requirement, constraints and changes.
每个项目都有其功能性和非功能性需求、约束和变更。
Each project brings its functional and non functional requirement, constraints and changes.
每个项目都有其功能性和非功能性需求、约束和变更。
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