1. Requirement confirmation and acceptance: At the initial stage of the project, confirm the customer's requirements through meetings or surveys, communicate and negotiate with customers on requirements and functions, and finally reach an agreement. This is the first acceptance, which will be carried out before the project is officially launched.
2. Acceptance of design scheme: After confirming the requirements, the project team starts to design the scheme, including technical scheme, design blueprint and interface design, and submit the design documents to the customer for confirmation. This is the second acceptance.
3. Mid-term acceptance: In the process of project development, it is necessary to show the development progress to customers regularly and accept their feedback and suggestions. This is the third acceptance.
4. Product acceptance: After the development is completed, product acceptance is needed to test whether the functions of the system meet the needs of customers and check the loopholes and anomalies in the system. This is the fourth acceptance.
5. Final acceptance: After the product is successfully accepted, it is necessary to comprehensively test the system performance, including stability, safety and performance, to confirm that the system can be put into operation. This is the final acceptance.