18.5 ISO 9001

16.3 Team Software Process ^SM

The benefits of using the Team Software Process ^SM to help produce 10,000 lines of code are $4,341,496. This was obtained by subtracting $168,501 in new total life cycle costs from $4,509,997 in old total life cycle costs.

The special, new, or additional costs that are required to introduce the Team Software Process ^SM consist of only the training cost. The training cost to use the Team Software Process ^SM to help produce 10,000 lines of code is $148,400.

The development cost of $168,501 was not included as a Team Software Process ^SM cost. The development cost actually decreased. Had the development cost of using the Team Software Process ^SM increased, the difference or increase would have been included.

Let's determine the B/CR of the Team Software Process ^SM to help produce 10,000 lines of code. Divide the benefits of $4,341,496 by the costs of $148,400 for the Team Software Process ^SM . The B/CR of using the Team Software Process ^SM to help produce 10,000 lines of code is 29:1.

However, the benefits of the Team Software Process ^SM must be adjusted, by first removing the costs. That is, the costs of inserting the Team Software Process ^SM as a SPI method must first be removed from the gross benefits. We'll call these the adjusted benefits of the Team Software Process ^SM . Subtract $148,400 in Team Software Process ^SM costs from $4,341,496 in gross Team Software Process ^SM benefits. The result is $4,193,096 in adjusted benefits. Table 22 illustrates the ROI of the Team Software Process ^SM .

Table 22: ROI of Team Software Process ^{S M}

SPI Method	Benefits/Costs
TSP SM Benefits (Gross)	$4,341 ,496
TSP SM Costs	$148,400
TSP SM B/CR	29:1
TSP SM Benefits (Adjusted)	$4,193,096
ROI	2,826%

Now we are ready to determine the ROI of the Team Software Process ^SM to help produce 10,000 lines of code. Divide the adjusted benefits of $4,193,096 by the costs of $148,400 for the Team Software Process ^SM . Multiply the result by 100%. The ROI of using the Team Software Process ^SM to help produce 10,000 lines of code is 2,826%.