We always tend to describe what our system can do, let's think about it, we should be more description to users, our system can not do what. In the process of system implementation, we must use users to clearly realize The computer system can be responsible for the scope. Only in this way can we help users do things that users need to do can also reduce our project risk. In order to ensure the operation of the system, there is a need for mandatory means in many places, and there are many The premise that must be met in advance can only be said that the information system is in the range suitable for its operation. It is flexible and efficient. Once he leaves this range, he has many problems.
