15.5 ISO 9001

14.3 Team Software Process ^SM

Let's begin by modeling the costs for analyzing, designing, and developing 10,000 lines of code. Let's further assume our software effort is 5,088 hours to analyze, design, and code 10,000 lines of code.

Let's also begin by estimating the cost of software testing and assume that good software testing is in place so as to be conservative. Let's assume that we started with 1,000 software defects. Let's further assume that our software testing process nabs two- thirds of our 1,000 defects or 667 software defects. Let's also assume it takes 10 hours to find each of the 667 software defects. That comes to 6,670 software testing hours.

Let's use our total life cycle cost model to determine the cost of developing 10,000 lines of code using software testing. The formula is software size multiplied by 10.51, less the test hours times nine. Our total life cycle cost for using software testing alone is 45,099.97 hours. Multiply 45,099.97 by $100, and the total life cycle cost of using software testing is $4,509,997 to develop 10,000 lines of code.

Now let's determine the total life cycle cost of developing 10,000 lines of code using the Team Software Process ^SM . The formula is software size divided by 5.9347. Our total life cycle cost for using the Team Software Process ^SM is 1,685 hours. Multiply 1,685 by $100. The total life cycle cost of using the Team Software Process ^SM is $168,501 to develop 10,000 lines of code. Table 10 illustrates the benefits of the Team Software Process ^SM .

Table 10: Estimated Benefits of Team Software Process ^{S M}

State	Total Life Cycle Cost
Before TSP SM	$4,509,997
After TSP SM	$168,501
Benefits	$4,341,496

Now we are ready to estimate the benefits of using the Team Software Process ^SM to help produce 10,000 lines of code. Subtract $168,501 from $4,509,997, which represents total life cycle costs. The benefits of using the Team Software Process ^SM to help produce 10,000 lines of code are $4,341,496.