Difference between revisions of "Legacy System (glossary)"

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''<blockquote>A comprehensive, integrated plan that identifies the acquisition approach and describes the business, technical, and support strategies that management will follow to manage program risks and meet program objectives. The Acquisition Strategy should define the relationship between the acquisition phases and work efforts, and key program events such as decision points, reviews, contract awards, test activities, production lot/delivery quantities, and operational deployment objectives. (DAU February 19, 2010)</blockquote>''
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<blockquote>(1) ''A system that has been in operation for a long time, and whose functions are too essential to be disrupted by upgrading or integration with another system.'' (Arbutus Software 2012)</blockquote>
  
====Source====
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<blockquote>(2) ''A legacy system is an old method, technology, computer system, or application program that continues to be used, typically because it still functions for the users' needs, even though newer technology or more efficient methods of performing a task are now available. A legacy system may include procedures or terminology which are no longer relevant in the current context, and may hinder or confuse understanding of the methods or technologies used.'' (Wikipedia Contributors 2012)</blockquote>
DAU. February 19, 2010. ''Defense Acquisition Guidebook (DAG)''. Ft. Belvoir, VA, USA: Defense Acquisition University (DAU)/U.S. Department of Defense (DoD).  
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===Source===
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(1) Arbutus Software. "Legacy Systems." Accessed September 12, 2012. Available at: http://www.arbutussoftware.com/data-source/legacy-systems/.
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(2) Wikipedia contributors. "Legacy system." ''Wikipedia'', The Free Encyclopedia, http://en.wikipedia.org/w/index.php?title=Legacy_system&oldid=511592171 (accessed September 13, 2012).
  
 
===Discussion===
 
===Discussion===
Discussion as to why this is the "consensus" definition for the SEBoK.
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Seacord, R.C., D. Plakosh, and G.A. Lewis. 2003. ''[[Modernizing Legacy Systems]]: Software Technologies, Engineering Processes, and Business Practices''. Boston, MA, USA: Pearson Education.
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discusses the difficulties of updating or modifying a legacy system's software 
  
 
[[Category:Glossary of Terms]]
 
[[Category:Glossary of Terms]]
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<center>'''SEBoK v. 2.1, released 31 October 2019'''</center>

Latest revision as of 15:04, 24 October 2019

(1) A system that has been in operation for a long time, and whose functions are too essential to be disrupted by upgrading or integration with another system. (Arbutus Software 2012)

(2) A legacy system is an old method, technology, computer system, or application program that continues to be used, typically because it still functions for the users' needs, even though newer technology or more efficient methods of performing a task are now available. A legacy system may include procedures or terminology which are no longer relevant in the current context, and may hinder or confuse understanding of the methods or technologies used. (Wikipedia Contributors 2012)

Source

(1) Arbutus Software. "Legacy Systems." Accessed September 12, 2012. Available at: http://www.arbutussoftware.com/data-source/legacy-systems/.

(2) Wikipedia contributors. "Legacy system." Wikipedia, The Free Encyclopedia, http://en.wikipedia.org/w/index.php?title=Legacy_system&oldid=511592171 (accessed September 13, 2012).

Discussion

Seacord, R.C., D. Plakosh, and G.A. Lewis. 2003. Modernizing Legacy Systems: Software Technologies, Engineering Processes, and Business Practices. Boston, MA, USA: Pearson Education.

discusses the difficulties of updating or modifying a legacy system's software

SEBoK v. 2.1, released 31 October 2019