Legacy Systems

For more information contact us

Legacy Systems

Organizations may have compelling reasons to maintain an old system, such as:

  • The system works satisfactorily, and the owner sees no reason to change it.
  • The costs of remodeling or replacing the system are prohibitive because it is large, monolithic, and/or complex.
  • Training on a new system would be very costly in time and money lost, compared to the appreciable anticipated benefits of replacing it (which may be zero).
  • The system requires close to 100 percent availability, so it cannot be taken out of service, and the cost of designing a new system with a similar level of availability is high. Examples include systems for managing customer accounts in banks, computerized reservation systems, air traffic control, power distribution (electrical grids), nuclear power plants, military defense facilities.
  • The way the system works is not well understood. This situation can occur when the system designers have left the organization, and the system has either not been fully documented or documentation has been lost.
  • The user expects that the system can be easily replaced when necessary.

Legacy systems often run on outdated (and usually slow) hardware. Spare parts for this equipment may become increasingly difficult to obtain.

If legacy software runs only on aging hardware, the cost of maintaining the system may outweigh the cost of replacing the software and hardware unless some form of emulation support allows the software to run on new hardware.

These systems can be difficult to maintain, improve, and expand because there is a general lack of knowledge of the system, personnel who are experts in it have retired or forgotten what they knew about it, and personnel who entered the field after who was "bequeathed" never found out about it. This can be exacerbated by lack or loss of documentation.

Integrating with newer systems can also be difficult because new software may use completely different technologies. The type of bridging hardware and software that remains available for different technologies that are popular at the same time are often not developed for different technologies at different times, due to the lack of high demand for it and the associated lack of reward from a large economy of market scale, although some of these "technologies" are assumed to be developed by vendors and enthusiasts of particular legacy technologies (often called "retro computing" by communities).

Enhancements to legacy software systems

If it is not possible to replace legacy systems through the practice of retirement implementation, it is still possible to improve them. The majority of development is often spent on adding new interfaces to a legacy system. The most important technique is to provide a Web-based interface to a terminal-based mainframe application. This can reduce staff productivity due to slower response times and slower action from a mouse-based operator, however, it is often seen as an "upgrade" because the interface style is familiar to users. non-specialized and find it easy to use.

Printing enhancements are problematic because legacy software systems often do not add formatting instructions, or they use protocols that are not usable on modern PCs. A print server can be used to intercept the data and translate it into more modern code. Rich Text Format (RTF) or PostScript documents can be created using inheritance and then interpreted to a PC before being printed.

Biometric security measures are difficult to implement in legacy systems. A viable solution is to use a telnet or http proxy server to sit between mainframe users to implement secure access to legacy applications.

The change is taking place in some organizations to switch to automated business processes, which generate complete systems. These systems can then connect to the organizations legacy systems and use them as data repositories. This approach can provide a number of significant advantages: users are insulated from the inefficiencies of their legacy systems, and changes can be quickly and easily incorporated into animal byproduct software.

If you have any questions or need a custom quote?

Do not hesitate to call us, we are at your service through (+502) 4725-4170