There is one other graph that is perhaps of interest. Let's assume that we can "add" the completion forces and the learning forces together. Force is a vector, so the assumption I am making here is that the completion forces and the learning forces are co-linear, or acting in the same direction, a somewhat arbitrary assumption. However, if I make this assumption, then I can sum the forces and get the total force on the project as a function of elapsed time, as Figure 12.10 shows. ## Figure 12.10. Total forces on a project (learning + completion).Let's look at some areas under the curves in the four regions.
For the mathematically and physically inclined, we know that the area is an integral, and the integral of force over time is equal to the change in momentum.
Note also that the discontinuity in the total force curve at the 40 percent boundary is not too large. That is probably also a good indicator. So the conclusions drawn from using Kruchten's and Royce's numbers for learning and completion percentages in the four phases are consistent with the benefits we believe we see in iterative development projects. While I have made many assumptions and pushed the model about as far as I am comfortable with, the results do appear to be both internally consistent and consistent with observed behavior. |

The Software Development Edge(c) Essays on Managing Successful Projects

ISBN: N/A

EAN: N/A

EAN: N/A

Year: 2006

Pages: 269

Pages: 269

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