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.
Business Information System Traditional Cost


Quantity Tables

Function Points per Table

Total Function Points

Function Point Cost

Total Initial Cost

Maintence Cycles

Percent Maintained

Maintenance Cycles Cost

Total Cost

200

80

16,000

$200

$3.2 million

5

25%

$3.2 million

$6.4 million

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
Business Information System Traditional Cost


Quantity Tables

Function Points per Table

Total Function Points

Function Point Cost

Total Initial Cost

Maintence Cycles

Percent Maintained

Maintenance Cycles Cost

Total Cost

160

80

12,800

$50

$640K

3

10%

$192K

$832K

 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.
