This step is to validate the software.The purpose is to prove that the system can operate normally and meet the most basic functional requirements. This graduation project uses the black box test, and the final probability is:(1) It may meet the requirements of the graduation project, and the designed system is acceptable.(2) The interface is not beautiful enough, the function needs to be strengthened, and there is room for improvement.Problems found during this phase of the test, if you think about it carefully, are actually related to the requirements report.Therefore, it is best to fix the problems and requirements before the demand analysis stage, otherwise, the later, the higher the cost of error correction.