The inmost Envelope is where the agile team works to execute the; software development, unit testing, component testing, integration testing and defect resolution.
最里面的信封是由敏捷团队来执行的工作：软件开发、单元测试、组件测试、集成测试和缺陷修正。
2
Load testing to the point of breaking the server(s) lets you know the performance envelope of you systems.
将负载加到最大，直到服务器运行中止，这样做可以发现系统的性能极限。
3
Other recent accomplishments include expanding the ceiling envelope to 14,000 feet, flight testing with external weapon stores.