e:\legacy systems3
Post on 17-Jun-2015
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Legacy Systems
A Necessary Evil
General Info
• NPOs in general have little to no tech budget.• Government is the same.• Specialized Operations
GR Water
• LMFP• CB• Boosters• Field Ops• Meters• Customer Service• Take a tour of water:
http://www.grcity.us/departments/water/CD/water-system-tap-back-1.html
Keeping the Legacy Alive
• Cost• Resistance to Change• Fear of future problems
How to Combat Problems
• Cost comparison • Integration over time, bribery• Available support
– http://antfarm/department.pl?dept=DOIT– Manufacturer resources
• Lessons Learned• BPI• Advantages of Replacement
Recommended Actions By Category
CM9% Cost
3%
Documentation14%
Personnel11%
Requirements7%System Design
16%
SE14%
System Upgrades
4%
Test8%
Vendor Product
14%
Coldbrook Control Center
The OLD system
RTUs
old newer
ScadaVision and Fix32
Sample Scada Booster Display
Training and Technology Legacy Costs
•Is training included in bid?•Who corrects mistakes?•Who checks the contractor’s work?•Voter/citizen scrutiny and transparency in government spending•The Future of SCADA
•http://www.youtube.com/watch?v=ca0hyf6tM2U
SOURCES
1. Chiasson, Michel. “Should Legacy Systems Stay or Should They Go?” National Underwriter. Life and Health. Sep 4, 2006. ABI/INFORM global pg. 50.2. Clabaugh, Gavin. Class interview/presentation 3/15/2010.Kulonda, Dennis, University of Central Florida, Mohammed Arif, Carthage College, & Captain Jennifer Luce, United States Air Force. Journal of Knowledge Management Practice, December 2003 Legacy Systems: Must History Repeat Itself? http://www.tlainc.com/articl59.htm3. Kavanagh, John. “Moving Ahead with the Best of the Old.” Computer Weekly. Sutton: Apr 12, 2005. pg 36-7.4. McIntyre, Ken. Electrician II for City of Grand Rapids Water Systems. Multiple interviews and discussions during the semester.5.Robertson, Paul. “Integrating Legacy Systems with Modern Corporate Applications.” Communications of the ACM. May 1197. Vol. 40, No. 5. pg 39.6. Schach, S.R., (1990), “Software Engineering”, Irwin, Homewood, IL.
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