System Hierarchy - Systems Modeling Simulation Lab. KAIST

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Why Break a Product Down Breaking a large complex problem (project) into smaller pieces makes them easier to solve since the problems are smaller and specialists can focus on their functional areas. But this process of reductionism creates some new problems. Namely, New interfaces are created between the pieces (subsystems), so they must be defined and managed. System resources (e.g., mass or power) must be allocated to the subsystems and these allocations must be accounted for; and System performance is also allocated to subsystems, so confidence must be established that if all of the subsystems perform as desired, then the system will perform as desired. The creation of the system architecture, the description and management of interfaces, the allocation of resources and performances, and establishing confidence that these allocations are appropriate are all systems engineering responsibilities. Space Systems Engineering: System Hierarchy Module 4
More Value to Creating A System Hierarchy Organizes the work required to complete a flight project. Contains all hardware items, software items, and information items (e.g., documents, databases). Provides the basis for functional analysis. Characteristics: • Top-down, • Product-based, • Lowest level maps to cognizant engineer or manager, • Branch points in hierarchy show how elements will be integrated. Space Systems Engineering: System Hierarchy Module 5
Page 1 and 2: CC532 Collaborate System Design Fun
Page 3: One View of the Architecture - The
Page 7 and 8: System Hierarchy (1/2) Hierarchy/H
Page 9 and 10: System Hierarchy Example - Space Sh
Page 11 and 12: Definition Work Breakdown Structure
Page 13 and 14: Work Breakdown Structure (WBS) A
Page 15 and 16: Example: NASA’s SOFIA Project PBS
Page 17 and 18: Techniques for Developing a WBS
Page 19 and 20: Backup Slides for System Hierarchy
Page 21 and 22: NASA Space Flight Project Standard
Page 23 and 24: NASA Space Flight Project Standard
Page 25 and 26: Rules for the NASA Standard WBS 1.
Page 27 and 28: Common WBS Errors (2/3) Error 2: In
Page 29 and 30: Space Systems Engineering: System H
Page 31 and 32: Organizational Structure for Explor
Page 33: Constellation Program Systems Engin

System Hierarchy - Systems Modeling Simulation Lab. KAIST

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