Black-box testing treats the software as a "black box," without any knowledge of internal implementation and the test engineer will perform tests on the software as a customer would use the product.
This stage was a big step towards improvement in many aspects: planning, communication, and customer (system engineer) collaboration.
这一阶段向诸多方面的改进前进了一大步：计划，沟通和客户(系统工程师)合作。
3
You get better perspectives on the deal - a customer will level with an engineer in a way he might not with you - and it makes your company seem bigger to the customer.