{"title":"Paring UML and DODAF down to the project-vital set of diagrams","authors":"John C. Zubeck","doi":"10.1109/SYSTEMS.2009.4815764","DOIUrl":"https://doi.org/10.1109/SYSTEMS.2009.4815764","url":null,"abstract":"Most projects do not have the resources to produce and support all types of UML and DODAF diagrams. Analysis literature gives little guidance on which types of diagrams are vital for certain types of projects and domains. Here a veteran software engineer describes precisely which types of diagrams are vital and which are less important for different software projects. Also they offer some practical design strategies for applying UML and DODAF with projects centered around web database development.","PeriodicalId":131616,"journal":{"name":"2009 3rd Annual IEEE Systems Conference","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125160960","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Complex Adaptive Systems Engineering (CASE)","authors":"B. White","doi":"10.1109/SYSTEMS.2009.4815774","DOIUrl":"https://doi.org/10.1109/SYSTEMS.2009.4815774","url":null,"abstract":"We suggest a portfolio of distinct but related systems engineering activities that collectively may work well in very difficult environments. The CASE methodology acknowledges the human factor and encourages exerting influence rather than control. We advocate their consideration and application in limited domains, at first, to gain confidence in their viability.","PeriodicalId":131616,"journal":{"name":"2009 3rd Annual IEEE Systems Conference","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115818500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
R. Stevens, Margaret K. King, J. Beard, Marc R. Halley
{"title":"Adapting the process: Enablers and barriers to innovation in systems engineering and acquisition processes","authors":"R. Stevens, Margaret K. King, J. Beard, Marc R. Halley","doi":"10.1109/SYSTEMS.2009.4815827","DOIUrl":"https://doi.org/10.1109/SYSTEMS.2009.4815827","url":null,"abstract":"Engineering and acquisition of information technology (IT) systems frequently involve high levels of uncertainty in requirements, design and technology. Addressing these uncertainties requires engineering and acquisition strategies and processes that are directed at garnering flexibility in the face of requirements and technology uncertainty. This paper reports on ongoing research to identify such candidate strategies with particular emphasis on insights gained from field research into the enablers and barriers to implementing non-traditional practices. A model of innovation readiness is presented and its applicability is described.","PeriodicalId":131616,"journal":{"name":"2009 3rd Annual IEEE Systems Conference","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131573446","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Christopher J. Roberts, M. Richards, A. Ross, D. Rhodes, D. Hastings
{"title":"Scenario planning in dynamic multi-attribute tradespace exploration","authors":"Christopher J. Roberts, M. Richards, A. Ross, D. Rhodes, D. Hastings","doi":"10.1109/SYSTEMS.2009.4815828","DOIUrl":"https://doi.org/10.1109/SYSTEMS.2009.4815828","url":null,"abstract":"The long time scales associated with complex system design and operation necessitate front-end systems engineering methodologies that enable consideration of alternative futures. This paper advances scenario planning techniques through a parameterization and ordering of potential future contexts and stakeholder expectations (e.g., articulated system attributes, available technology, funding levels, and supporting infrastructures). After surveying existing approaches for scenario planning, a methodology for specifying and analyzing large numbers of alternative system timelines is presented. A satellite radar case study is used to motivate and illustrate the value of this approach. Benefits of the methodology include: (1) broader and more rigorous consideration of alternative future needs, contexts, and timelines, (2) identification of gaps in traditionally-derived scenario sets, (3) identification of passively value-robust system alternatives, and (4) providing a basis for evaluating system evolution strategies that enable sustainment of value delivery across potential timelines.","PeriodicalId":131616,"journal":{"name":"2009 3rd Annual IEEE Systems Conference","volume":"11 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132328672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Using Pareto Trace to determine system passive value robustness","authors":"A. Ross, D. Rhodes, D. Hastings","doi":"10.1109/SYSTEMS.2009.4815813","DOIUrl":"https://doi.org/10.1109/SYSTEMS.2009.4815813","url":null,"abstract":"An important role of system designers is to effectively explore the tradespace of alternatives when making design decisions during concept phase. As systems become more complex, formal methods to enable good design decisions are essential; this can be empowered through a tradespace exploration paradigm. This paper demonstrates the use of the Pareto Trace and associated metrics to identify system alternatives across tradespaces with high degrees of passive value robustness—alternatives that continue to deliver value to stakeholders in spite of changes in needs (attributes) or context. A value-driven tradespace approach is used to represent the baseline performance versus cost of a large number of system alternatives. The classical notion of Pareto Set is extended to identify alternatives and their characteristics that lead to their inclusion in Pareto Sets across changing contexts. Using a low-earth orbiting satellite case example, five types of context changes are used to demonstrate this method: 1) addition or subtraction of attributes; 2) change in the priorities of attributes; 3) change in single attribute utility function shapes; 4) change in multi-attribute utility aggregation function; and 5) addition of new decision maker. This approach demonstrates the ability for system designers to pose questions about assessment of alternatives during early conceptual design. Suggestions for application of Pareto Trace beyond the case example are discussed and presented, including application of a “fuzziness” factor and statistical measures. In particular, distinctions from traditional sensitivity analysis are made, as well as linkages to dynamic analysis for discovery of generalized value robust alternatives.","PeriodicalId":131616,"journal":{"name":"2009 3rd Annual IEEE Systems Conference","volume":"145 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132314864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A formal method approach to analyze the design of aircraft Flight Control Systems","authors":"Manju Nanda, Shrisha Rao","doi":"10.1109/SYSTEMS.2009.4815773","DOIUrl":"https://doi.org/10.1109/SYSTEMS.2009.4815773","url":null,"abstract":"The paper shows how the system algebra formal method can be used to analyze the system design of safety critical systems like the Flight Control Systems (FCS) of Jaguar, Airbus A380, and the Boeing 777 aircraft. The capability of the system algebra to verify critical system features like system availability, redundancy, coupling and fault tolerance based on the system states is demonstrated by simulation The results presented are verification of the safety design requirements of the Jaguar aircraft, and a comparison of the FCSs of the Boeing 777 and Airbus A380. A comparison of system algebra with other popular system analysis approaches like the reliability block diagram (RBD) and fault tree analysis (FTA) is discussed.","PeriodicalId":131616,"journal":{"name":"2009 3rd Annual IEEE Systems Conference","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126815720","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}