4.6 Questions 83 n n n n Use case diagram represents functionality in terms of how a system is used by external entities (i.e., actors) to accomplish a set of goals Block definition diagram represents structural elements called blocks, and their composition and classification Internal block diagram represents interconnection and interfaces between the parts of a block Parametric diagram represents constraints on property values, such as F [ m * a, used to support engineering analysis 4.6 QUESTIONS 1. Show how a stopping distance requirement would be captured in Figure 4.2. In the following questions, assume a change in the stopping distance is required. 2. Would you anticipate any changes to the block definition diagram in Figure 4.3? 3. Would you anticipate any significant changes to the use case diagram in Figure 4.4? 4. Would you anticipate any significant changes to the sequence diagram in Figure 4.5? 5. Describe an activity diagram analogous to Figure 4.7 to address the braking requirements. 6. Describe an internal block diagram analogous to Figure 4.9 to address the braking requirements. 7. Describe additions to the vehicle hierarchy in Figure 4.10 to address the braking requirements.