Pre-Milestone A and Early-Phase Systems Engineering A Retrospective Review and Benefits for Future Air Force Systems Acquisition (2008) / Chapter Skim
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Appendix C: What Is Systems Engineering?
Appendix C: What Is Systems Engineering?
Pages 124-132
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From page 124... ...
To capture all of the essential elements addressed in this report, the committee chose a fairly detailed, three-part definition of SE: (1) SE is the translation of a need or deficiency into a system architecture through the application of rigorous methods to the iterative process of functional analysis, allocation, implementation, optimization, test, and evaluation; (2)
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From page 125... ...
Examples are an aircraft onboard communications subsystem or an airport control tower as a subsystem of the air transportation system. Assemblyb An integrated set of components and/or subassemblies that constitute a defined part of a subsystem, e.g., the pilot's radar display console on the fuel injection assembly of the aircraft propulsion subsystem.
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From page 126... ...
integrate related technical parameters and ensure compatibility of all related, functional, and program interfaces in a manner that optimizes the total system definition and design; and (3) integrate reliability, maintainability, safety, survivability, human, and other such factors into the total technical engineering effort to meet cost, schedule, and technical performance objectives.
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From page 127... ...
. SOURCE: C-1 Modified from Systems Design and Operational Effectiveness 625 Class Notes -- "Systems Design and Operational Effectiveness," Stevens Institute of Technology, 2007.
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From page 128... ...
Once the blueprint enters the design, development, and acquisition process, the architecture description is then transformed into a real implementation of capabilities and assets in the field. An architecture framework provides guidance in describing architectures, but requires other tools in the tool set to move from representation to implementation of capabilities and assets.
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From page 129... ...
Some practices to be considered include the following: • Well-documented processes, readily accessible to the users by being Webbased, searchable, and readily available online and in real time; can be tailored on a program-by-program basis prior to program baselining; and configuration can be managed under a synchronized, yet independent process on each program once the program is baselined; • Templates for all engineering tasks organized by function and discipline, with examples of prior successes and links to available experts; • Lists of available, compatible tool sets matched with the engineering tasks that they automate or support, with solved problems in a searchable archive; • Lists of metrics appropriate to each task and program phase, with the mechanisms for automated collection, tools for analysis, examples of detected anomalies, and links to available experts with experience using the tools and in performing the analyses; • Boilerplate work packages validated by prior usage and containing hints for tailoring and expediting, and parametric models of the effort required to
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From page 130... ...
Modeling and simulation can be used in a distributed collaborative environment that supports authoritative information exchange and rapid refinement of the design or concept, and over the system life cycle to respond to changing circumstances such as technological advances, changing threats, tactics, or doctrine. Much of the modeling and simulation activity during the pre-Milestone A period is the responsibility of the systems engineers and development planning experts in the government acquisition organization.
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From page 131... ...
The concept development phase is guided by the Initial Capabilities Document and AoA with continuous feedback to develop a technology development strategy. Modeling and simulation, optimization, and life cycle costing are all needed to conduct a meaningful analysis of alternatives.
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From page 132... ...
SOURCE: Department of Defense Instruction 5000.2, 2003, Operation of the Defense Acquisition C-3 System.
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