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Brownfield Systems Development: Moving from the Vee Model to the N Model for Legacy Systems
Author(s) -
Walden David D.
Publication year - 2019
Publication title -
incose international symposium
Language(s) - English
Resource type - Journals
ISSN - 2334-5837
DOI - 10.1002/j.2334-5837.2019.00654.x
Subject(s) - brownfield , perspective (graphical) , development (topology) , computer science , systems engineering , extension (predicate logic) , engineering , civil engineering , artificial intelligence , mathematics , mathematical analysis , redevelopment , programming language
Most systems engineering standards, references, and textbooks consider systems development from a “greenfield” (i.e., clean‐sheet, new development) perspective. There are several development (or life cycle) models used for greenfield developments, with the “Vee” model being a popular choice. Many development efforts are better considered from a “brownfield” perspective (i.e., improving upon or replacing legacy systems). This paper proposes an extension of the Vee model, called the N model, which adds a site survey and various reconstruction processes to help move from the as‐is system to the to‐be system for brownfield development efforts. Three examples are provided to demonstrate how the N model can be applied in different situations.