System Hierarchy - Systems Modeling Simulation Lab. KAIST

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Module Summary: System Hierarchy A product breakdown structure (PBS) captures the hierarchy of the system and is one representation of the system architecture. Creating a system hierarchy is valuable since it breaks a complex problem into smaller pieces that will be easier to tackle. But this reductionism, or decomposition has a price: • New interfaces are created between the pieces (subsystems), so they must be defined and managed. • System resources (e.g., mass or power) must 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 that the system will perform as desired. The work breakdown structure (WBS) extends the PBS in that it captures all of the work necessary for a project by adding the non-product work necessary for a successful project (e.g., integration, test, logistics support, systems engineering and management). Space Systems Engineering: System Hierarchy Module 18
Backup Slides for System Hierarchy Module Note slides 26-28 demonstrate some common errors in PBS and WBS structure. The pilot students found these useful, so they could be included in the body of the lecture. Space Systems Engineering: System Hierarchy Module
Page 1 and 2: CC532 Collaborate System Design Fun
Page 3 and 4: One View of the Architecture - The
Page 5 and 6: More Value to Creating A System Hie
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: Techniques for Developing a WBS
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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