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Legacy System Modernization Strategies

Technical Report
This 2001 report discusses alternative development approaches for incrementally modernizing legacy systems.
Publisher

Software Engineering Institute

CMU/SEI Report Number
CMU/SEI-2001-TR-025

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.

Cite This Technical Report

Seacord, R., Comella-Dorda, S., Lewis, G., Place, P., & Plakosh, D. (2001, July 1). Legacy System Modernization Strategies. (Technical Report CMU/SEI-2001-TR-025). Retrieved February 21, 2024, from https://insights.sei.cmu.edu/library/legacy-system-modernization-strategies/.

@techreport{seacord_2001,
author={Seacord, Robert and Comella-Dorda, Santiago and Lewis, Grace and Place, Patrick and Plakosh, Daniel},
title={Legacy System Modernization Strategies},
month={Jul},
year={2001},
number={CMU/SEI-2001-TR-025},
howpublished={Carnegie Mellon University, Software Engineering Institute's Digital Library},
url={https://insights.sei.cmu.edu/library/legacy-system-modernization-strategies/},
note={Accessed: 2024-Feb-21}
}

Seacord, Robert, Santiago Comella-Dorda, Grace Lewis, Patrick Place, and Daniel Plakosh. "Legacy System Modernization Strategies." (CMU/SEI-2001-TR-025). Carnegie Mellon University, Software Engineering Institute's Digital Library. Software Engineering Institute, July 1, 2001. https://insights.sei.cmu.edu/library/legacy-system-modernization-strategies/.

R. Seacord, S. Comella-Dorda, G. Lewis, P. Place, and D. Plakosh, "Legacy System Modernization Strategies," Carnegie Mellon University, Software Engineering Institute's Digital Library. Software Engineering Institute, Technical Report CMU/SEI-2001-TR-025, 1-Jul-2001 [Online]. Available: https://insights.sei.cmu.edu/library/legacy-system-modernization-strategies/. [Accessed: 21-Feb-2024].

Seacord, Robert, Santiago Comella-Dorda, Grace Lewis, Patrick Place, and Daniel Plakosh. "Legacy System Modernization Strategies." (Technical Report CMU/SEI-2001-TR-025). Carnegie Mellon University, Software Engineering Institute's Digital Library, Software Engineering Institute, 1 Jul. 2001. https://insights.sei.cmu.edu/library/legacy-system-modernization-strategies/. Accessed 21 Feb. 2024.

Seacord, Robert; Comella-Dorda, Santiago; Lewis, Grace; Place, Patrick; & Plakosh, Daniel. Legacy System Modernization Strategies. CMU/SEI-2001-TR-025. Software Engineering Institute. 2001. https://insights.sei.cmu.edu/library/legacy-system-modernization-strategies/