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4.1 Traditional Calculation
From the ROI on data models, an enterprise is likely to have 100 reasonable sized business information systems with about 200 database tables each.
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Business Information System Traditional Cost
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|
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Quantity Tables
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Function Points per Table
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Total Function Points
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Function Point Cost
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Total Initial Cost
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Main-tence Cycles
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Percent Maintained
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Main-tenance Cycles Cost
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Total Cost
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200
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80
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16,000
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$200
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$3.2 million
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5
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25%
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$3.2 million
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$6.4 million
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Notes:
- This includes the expected overlap resulting from not employing Resource Life Cycles Analysis.
- This presumes 5 cycles of maintenance from not starting first implementation at Cycle 6 (ROI, Data Centered Development and Maintenance)
- For an enterprise inventory of 100 such systems, the total initial cost is $640 million.
4.2 Changed Approach Calculation
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Business Information System Traditional Cost
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|
|
Quantity Tables
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Function Points per Table
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Total Function Points
|
Function Point Cost
|
Total Initial Cost
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Main-tence Cycles
|
Percent Main-tained
|
Main-tenance Cycles Cost
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Total Cost
|
|
160
|
80
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12,800
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$50
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$640K
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3
|
10%
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$192K
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$832K
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- This excludes the expected overlap resulting from applying Resource Life Cycles Analysis. (200 * .8 = 160)
- This presumes 3 cycles of only 10% maintenance by starting first implementation at Cycle 6 (ROI, Data Centered Development and Maintenance)
- For an enterprise inventory of 100 such systems, the total initial cost is $83.2 million.
4.3 ROI Summary
The ROI created from the traditional approach cost to the changed approach is 7.7. That is a dramatic reduction is cost.
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