3._System_Life_Cycle - Objectives System Life Cycle What...

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System Life Cycle Objectives ± What are the phases of a system life cycle (horizontal)? ± What are the major system engineering models? ± What are the levels of a system hierarchy (vertical)? ± Want are the key focus areas for a system engineer? Using a Life Cycle to Describe a System ± We can organize system development activities in a logical fashion that recognizes some activities must be accomplished before others. ± We can identify the specific activities that need to be accomplished in one phase to successfully move to the next stage. ± We can assess what impact decisions in one stage affect activities in a later stage. The Law of Unintended Consequences ± When you make a decision there will be an effect that you may or may not be what you wanted; there will also be three other effects you never expected and one of those is usually unpleasant. System Life Cycle Stages ± Establish system need ± Develop system concept ± Design and develop the system ± Produce the system ± Deploy the system ± Operate the system ± Retire the system Lust Dust System Engineering Models
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Some other System Engineering Models ± MIL STD 499B ² Focus is on the development of defense systems ± EIA IS 632 ² A demilitarized version of MIL STD 499B ± IEEE 1220 ² Introduces an interdisciplinary approach to transformation of client needs, requirements and constraints into a system solution. ± EIA 632 ² Focus on defining the process that can be applied to any enterprise- based life cycle phase in engineering or reengineering a system. ± ISE 15288 ² Includes both systems engineering and engineering management functions at a high level of abstraction. The Systems Engineering Process Functional Analysis/ Allocation Requirements Analysis Synthesis System Analysis and Control Verification Process Inputs Process Outputs Phases of a System Life Cycle Buede, Dennis M., The Engineering Design of Systems, John Wiley & Sons, 2000. The Systems Engineering “Vee” Forsberg, K., and Mooz, H. (1992). The relationship of systems engineering to the project cycle. Engineering Management Journal, 4(3), pp. 36-43. The Spiral Model for Software System Architectures Chapanis, A., Human Factors in Systems Engineering, New York: John Wiley & Sons, 1996, pp. 29-35.
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IOC The Defense Acquisition Management Framework DoDI 5000.2, May 2003 DoDI 5000.2, May 2003 B A Concept Refinement System Development & Demonstration Production & Deployment Systems Acquisition Operations & Support C User Needs & Technology Opportunities Sustainment Process entry at Milestones A, B, or C Entrance criteria met before entering phase Evolutionary Acquisition or Single Step to Full Capability FRP Decision Review FOC LRIP/IOT&E Design Readiness Review Technology Development (Program Initiation) New Concept Decision Pre-Systems Acquisition Fig. 1, DoDI 5000.2 The MDA may authorize entry into the acquisition process at any point consistent with phase-specific entrance criteria and statutory requirements Project Management Focus Areas Standards’ ‘Side-Effects’ ±
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3._System_Life_Cycle - Objectives System Life Cycle What...

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