17.2 Personal Software ProcessSM

15.2 Personal Software Process ^SM

The benefits of using the Personal Software Process ^SM to help produce 10,000 lines of code are $4,469,997. This was obtained by subtracting $40,000 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 Personal Software Process ^SM consist of only the training cost. The training cost to use the Personal Software Process ^SM to help produce 10,000 lines of code is $105,600. This is a conservative estimate of Personal Software Process ^SM training costs. There are many more courses that must be taken.

The development cost of $40,000 was not included as a Personal Software Process ^SM cost. The development cost actually decreased. Had the development cost of the Personal Software Process ^SM increased, the difference or increase would have been included. Table 15 illustrates the B/CR of the Personal Software Process ^SM .

Table 15: B/CR of Personal Software Process ^{S M}

SPI Method	Benefits/Costs
PSP SM Benefits	$4,469,997
PSP SM Costs	$105,600
B/CR	42:1

Now we are ready to determine the B/CR of the Personal Software Process ^SM to help produce 10,000 lines of code. Divide the benefits of $4,469,997 by the costs of $105,600 for the Personal Software Process ^SM . The B/CR of using the Personal Software Process ^SM to help produce 10,000 lines of code is 42:1.