Chapter 9: Team Software ProcessSM ROI Methodology

8.3 PSP ^SM B/CR Methodology

The B/CR methodology for the Personal Software Process ^SM is a procedure to measure, quantify, and analyze the ratio of benefits to costs. The ratio of benefits to costs for the Personal Software Process ^SM is high because maintenance costs are eliminated. B/CR is the economic magnitude of using the Personal Software Process ^SM to create a new and improved software process. Its B/CR methodology is a two-part process that consists of estimating special costs and the B/CR. Its benefit methodology consists of combining the benefits together with the special costs using a simple B/CR formula. Key elements include isolating the special, new, or additional costs and using the output of earlier total life cycle cost models. Figure 35 illustrates the B/CR methodology for the Personal Software Process ^SM .

Figure 35: B/CR Methodology for Personal Software Process ^SM

Estimate special costs for PSP ^SM : The objective of this activity is to identify and separate the costs associated with PSP ^SM from common software development costs. This substep includes: identify training cost for PSP ^SM .

Estimate B/CR for PSP ^SM : The objective of this activity is to measure the magnitude of the benefits to the costs for implementing PSP ^SM . This substep includes: divide benefits by special costs for PSP ^SM .