Enterprise Unified Process

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The Enterprise Unified Process (EUP) is an extended variant of the Unified Process and was developed by Scott W. Ambler and Larry Constantine in 2000, eventually reworked in 2005 by Ambler, John Nalbone and Michael Vizdos.[1] EUP was originally introduced to overcome some shortages of RUP, namely the lack of production and eventual retirement of a software system. So two phases and several new disciplines were added. EUP sees software development not as a standalone activity, but embedded in the lifecycle of the system (to be built or enhanced or replaced), the IT lifecycle of the enterprise and the organization/business lifecycle of the enterprise itself.[2] It deals with software development as seen from the customer's point of view.

In 2013 work began to evolve EUP to be based on Disciplined Agile Delivery instead of the Unified Process.


The Unified Process defines four project phases

To these EUP adds two additional phases


The Rational Unified Process defines nine project disciplines

To these EUP adds one additional project discipline

and seven enterprise disciplines

Best Practices of EUP[edit]

The EUP provide following best practices:-

  1. Develop iteratively
  2. Manage requirements
  3. Proven architecture
  4. Modeling
  5. Continuously verify quality.
  6. Manage change
  7. Collaborative development
  8. Look beyond development.
  9. Deliver working software on a regular basis
  10. Manage risk

See also[edit]


  1. ^ See Ramsin(2008) and Ambler et al. (2005) for details on history of EUP
  2. ^ Ambler et al (2005) p.7


  • Ambler, Scott W.; Constantine, Larry L. (2000), The unified process inception phase: best practices in implementing the UP, Focal Press, ISBN 978-1-929629-10-7
  • Ambler, Scott W.; Constantine, Larry L. (2000), The unified process elaboration phase: best practices in implementing the UP, Focal Press, ISBN 978-1-929629-05-3
  • Ambler, Scott W.; Constantine, Larry L. (2000), The unified process construction phase: best practices for completing the unified process, Focal Press, ISBN 978-1-929629-01-5
  • Ambler, Scott W.; Constantine, Larry L. (2002), The Unified process transition and production phase, Focal Press, ISBN 978-1-57820-092-4
  • Ambler, Scott W; Nalbone, John; Vizdos, Michael J (2005), The Enterprise Unified Process : extending the Rational Unified Process, Prentice Hall PTR, Bibcode:2005eup..book.....A, ISBN 978-0-13-191451-3, OCLC 57380579
  • Ramsin, Raman (2008). "Process-centered review of object oriented software development methodologies". ACM Computing Surveys. Association of Computing Machinery ACM. 40 (1): 1–89. doi:10.1145/1322432.1322435. S2CID 13604145.

External links[edit]