是什么使一个软件测试基础结构的维护成本的增长超出控制？
What can make the maintenance costs of a software test infrastructure grow out of control?
维护成本与日俱增，因为要维护相似或相同服务的多个副本，并且不存在对此类服务的任何控制，从而进一步阻碍了开发。
The maintenance costs are increasing because multiple copies of similar or the same services are being maintained, and there's no control over such services, which halts further development.
成本和盈利值：为了维护对整个项目周期开销的控制。
Cost and earned value: To maintain control over expenditures throughout the project lifecycle.
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