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Legacy System Modernization Strategies

Abstract

Modernization of legacy enterprise systems introduces many challenges due to the size, complexity, and frailty of the legacy systems. Size and complexity issues often dictate that these systems are incrementally modernized, and new functionality is incrementally deployed before the modernization effort is concluded. This in turn requires that legacy components operate side by side with modernized components in an operation system—introducing additional problems. 

In this report we discuss some alternative development approaches for incrementally modernizing legacy systems, including consideration of the advantages and disadvantages of each approach. These development alternatives can be mapped against the peculiarities of a particular modernization effort to recommend an appropriate approach.

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SEI

Seacord, Robert; Comella-Dorda, Santiago; Lewis, Grace; Place, Patrick; & Plakosh, Daniel. Legacy System Modernization Strategies (CMU/SEI-2001-TR-025). Software Engineering Institute, Carnegie Mellon University, 2001. http://resources.sei.cmu.edu/library/asset-view.cfm?AssetID=5729

IEEE

Seacord. Robert, Comella-Dorda. Santiago, Lewis. Grace, Place. Patrick, and Plakosh. Daniel, "Legacy System Modernization Strategies," Software Engineering Institute, Carnegie Mellon University, Pittsburgh, Pennsylvania, Technical Report CMU/SEI-2001-TR-025, 2001. http://resources.sei.cmu.edu/library/asset-view.cfm?AssetID=5729

APA

Seacord, Robert., Comella-Dorda, Santiago., Lewis, Grace., Place, Patrick., & Plakosh, Daniel. (2001). Legacy System Modernization Strategies (CMU/SEI-2001-TR-025). Retrieved July 31, 2014, from the Software Engineering Institute, Carnegie Mellon University website: http://resources.sei.cmu.edu/library/asset-view.cfm?AssetID=5729

CHI

Robert Seacord, Santiago Comella-Dorda, Grace Lewis, Patrick Place, & Daniel Plakosh. Legacy System Modernization Strategies (CMU/SEI-2001-TR-025). Pittsburgh, PA: Software Engineering Institute, Carnegie Mellon University, 2001. http://resources.sei.cmu.edu/library/asset-view.cfm?AssetID=5729

MLA

Seacord, Robert., Comella-Dorda, Santiago., Lewis, Grace., Place, Patrick., & Plakosh, Daniel. 2001. Legacy System Modernization Strategies (Technical Report CMU/SEI-2001-TR-025). Pittsburgh: Software Engineering Institute, Carnegie Mellon University. http://resources.sei.cmu.edu/library/asset-view.cfm?AssetID=5729