You should test for the overload at each point of the cycle.
您应当在周期的每个时刻都测试超负荷。
2
Additional functionality can be added through multiple iterations, which allows for change at any point before the next cycle begins.
可以通过多次迭代添加其他功能，这就允许在下个周期开始前，在任何时候进行更改。
3
Acceptance testing is at that point in the cycle where the technical test teams have already concluded the application is complete and ready for delivery to the customer.