In the process of computer software maintenance, corrective software maintenance mainly refers to software maintenance in the case of errors in the process of computer software application. According to the relevant statistics of software application, when the computer software is delivered and used, the coding errors and other problems in the computer software will often occur, accounting for about 3‰ of the overall computer software. Although this data is relatively small, but in the computer software coding set up very large, which will virtually increase the number of computer software coding, computer software applications brought a very large interference. So we are in the process of computer software maintenance, modification and maintenance according to this problem, to correct errors in the actual work mainly can be divided into 5 types, first is the calculation error of the software, followed by the software of logic errors, the third is the software coding errors, again is a software documentation errors, the software of data error, the above five kinds of computer software error in the process of practical application of high frequency, thus in the actual computer maintenance work in the process to pay due attention to the problem of this type of computer software, and in a timely manner for processing and maintenance.
In the process of computer software maintenance, adaptive software maintenance mainly refers to the targeted maintenance of the adaptability of computer software to the external environment in the application process. In computer software application in the process of the external environment change of computer software, mainly includes four kinds of external environment change, first of all is that computer related hardware upgrade changes, the second is the related operations of the computer system upgrade changes, is a computer related data upgrade changes again, the last is computer software research and development in the process of change related standards and relevant regulations. With the occurrence of the above four changes, we should specifically maintain the adaptive performance of computer software, so as to ensure that computer software can effectively adapt to the changes in the external environment of the computer in the process of application.
In the process of computer software maintenance, perfect work maintenance mainly refers to the improvement and upgrade of software performance in the process of computer software application, which can effectively improve the application performance and service life of computer software. It should be noted that in the process of maintenance of computer software perfection, the upgrades and performance improvements we made were not fully or fully reflected in the instructions carried by the software itself. This kind of computer software perfection work maintenance mainly is after the software application period, carries on the functional perfection according to the user's actual demand. In the process of this kind of maintenance work, although there is no original software manual for guidance, but in the actual work should still follow the software maintenance related guidelines and standards.