1, because the operation and maintenance expenses are usually calculated after the system construction is completed, and will not be generated until the system runs stably for a period of time. Within two years after the completion of the system construction, there is no operation and maintenance cost or the operation and maintenance cost is small enough to be declared.
2. In order to ensure the stable operation of the information system and the accuracy of data, necessary operation and maintenance work must be carried out, including regular inspection, backup, update and repair.