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Retirement & Replacement Step Description

In this step operation of the ITS is periodically assessed to determine its efficiency. If the costs to operate and maintain the system exceed the cost to develop a new ITS, the existing system becomes a candidate for replacement. A system retirement plan will be generated to retire the existing system gracefully without interruption of service.

Purpose

The purpose of this step is to:

1. Remove the system from operation, gracefully terminating or transitioning its service.
2. Dispose of the retired system properly

Activities

The activities of this step are:

1. Plan retirement and replacement.  This activity may occur during the initial planning for the system.
2. Evaluate cost of upgrade versus replacement.  A trade study (see the earlier step) can be used to make the decision regarding upgrade or replacement
3. Develop the replacement/retirement strategy.  A strategy needs to be planned so that a smooth transition for the system can occur.  

Related Resources

Chapter 4.11 Retirement/Replacement Systems Engineering for Intelligent Transportation Systems, January 2007

http://ops.fhwa.dot.gov/publications/seitsguide/section4.htm#s4.11

Cost: Free

Chapter 3.8.1 System Retirement / Replacement

Systems Engineering Guidebook for ITS, California Department of Transportation Division of Research and Innovation, January 2007

http://www.fhwa.dot.gov/cadiv/segb/views/document/Sections/Section3/3_8_1.htm?bcsi_scan_AEE9EC396C942F39=0&bcsi_scan_filename=3_8_1.htm

Cost: Free

Chapter 12: Disposition Phase - Systems Development Life Cycle Guidance Document, Department of Justice, January 2003

http://www.usdoj.gov/jmd/irm/lifecycle/ch12.htm

Cost: Free

Note:  Much of the material on this page was extracted from  http://www.itslessons.its.dot.gov/its/benecost.nsf/LessonSystemsEng.