system function is overturned during user testing phase

Only when the user tests, on-line and so on real gun dry, can be strict requirements to examine the system,

Constantly put forward requirements change, ease of use issues, modify the amount of work is the time to test the system architecture,

Good architecture, multiple requirements change, only need to modify one place on the line; poor architecture, a need to modify multiple places

The tragedy of this project is: a small demand, all the modules are to be turned over, modify the place up to 100 places!

And there are a number of similar requirements!!! To modify N hundred places!!!

What is this system architecture Ah!!

system function is overturned during user testing phase