After the system is installed you must maintain This means that computer programs should be modified and kept current.
Maintenance was done for two reasons:
- The first of these is to correct errors in software. errors commercial software for microcomputers are sometimes documented as "known anomalies, and corrected when releasing new versions of software or intermediate versions.
- The other reason is to improve the software's capabilities in response to changing organizational needs, and usually involve some of the following three situations:
1. Users frequently request additional features after they become familiar with the computer system and its capabilities.
2. The business changes over time. Software should be amended to include changes such as new reporting requirements and corporate government, the need to produce new information for customers, etcetera.
3. The hardware and software are changing at a rapid pace. A system that uses old technology can be modified to use the capabilities of a newer technology.
At some point it is more convenient to perform a new study of the system, because the ongoing maintenance cost is clearly greater than the creation of a completely new information system.
Once they are corrected, the system reaches a steady state providing accounting services to its users.
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