Legacy Information Systems

Today, companies face many obstacles in organizational structure. The outdated legacy information system (LIS) and changing business activities are the main motivation for organizational modernization (Syntel, 2008). Some of the major problems in NASCIO's 2008 legacy system survey are limited or unavailable software maintenance / upgrades, lack of knowledge about legacy application tools, lack of documentation, security It is strengthening measures or correction ability. (NASCIO, 2008).

Improvement of the legacy information system Traditional information technology systems that are outdated and ineffective efforts to modernize it are boring for many organizations. Leaders who undertake basic management changes to integrate the technical, contractual and program management skills necessary to effectively coordinate modernization work can eliminate plans from high risk lists It becomes high. For example, IRS's Business Systems Modernization Program was removed from the high risk list of GAO in 2013. This is because Customer Account Data Engine 2 which is the new information system was successfully installed.

An information system that continues to withstand changes and evolution due to high exchanges or redesign cost costs and continues to resist it is known as a legacy information system (Brodie & Stonebraker 1995, p. 103; Laudon & Laudon 2010, p. The evolution or emergence of legacy information systems in an organization may also occur as a result of mergers and acquisitions (Macknight 2005, p. 14). Older old hardware may consume power. The exchange may be costly or sometimes impossible due to the lack of skills or parts not available. In order to reduce such risks, there are organizations that need to maintain spare parts ownership and skills within the organization. Likewise, it is difficult to outsource software maintenance and troubleshooting skills, or outsourced service levels may not meet business needs. Depending on the changing business needs, the system may be flexible and need to be able to integrate with other systems (Bennett et al.