436 CHAPTER 17 Residential Security System Example OOSEM act Specify and Design System 17.3.1 set-up model 17.3.2 analyze stakeholder needs 17.3.7 manage requirements traceability 17.3.3 analyze system requirements 17.3.6 optimize and evaluate alternatives 17.3.4 define logical architecture 17.3.5 synthesize candidate physical architectures FIGURE 17.2 OOSEM Specify and Design System process. The action numbers refer to subsection where the action is described. areas, and specifies the mission requirements that the to-be system must support (refer to Section 17.3.2). The Analyze System Requirements activity specifies the system requirements in terms of its input and output responses and other black-box characteristics needed to support the mission requirements (refer to Section 17.3.3). The Define Logical Architecture activity decomposes the system into logical components and defines how the logical components interact to realize system requirements (refer to Section 17.3.4). The Synthesize Candidate Physical Architectures activity allocates the logical components to physical components that are implemented in hardware, software,