The closing management of system integration project is the last stage of system integration project management, which is mainly used to ensure the smooth delivery of the project and meet the requirements of customers, including the following aspects:

1. Confirm the customer acceptance criteria: Before the project ends, the project manager needs to confirm the acceptance criteria with the customer. This means that customers need to get a product delivery list and sign an acceptance letter after confirming that all requirements have been met. This can prevent disputes after the project is delivered.

2. Collecting project documents and materials: In the closing stage of the project, the project manager needs to collect all documents and materials related to the project and store them in an orderly manner. This will help to use relevant documents and materials in future projects and provide proof for quality assurance.

3. Total cost management: In the final stage of the project, the project manager needs to carry out cost management, including confirming the project cost, analyzing the cost deviation and calculating any unsettled expenses. This can help the project manager predict the cost of subsequent system integration projects.

4. Total Quality Management: Before the end of the project, the project manager needs to make a final audit of the quality in the project. This may include the final test and evaluation of the product, and confirm whether all the quality requirements of the system integration project are met.

5. Confirm the handover of work: After the project is completed, the project manager needs to confirm the handover of all work with the customer and relevant teams, including the configuration, maintenance and custody of the project before it is successfully delivered to the customer. Handover usually involves training, technical materials and operation manuals to ensure that customers can use the new system smoothly.

To sum up, the final management of system integration project is the last step of the whole system integration project management, which can ensure the quality and smooth delivery of the project, meet the needs of customers and provide support for the company's future projects.