Enabling Flexibility through Forming and Evolving Systems of Systems

Flexibility is a highly desired attribute of many systems operating in changing or uncertain conditions. This paper presents a study of enabling flexibility through designing and operating systems of systems (SoSs). The paper analyzes flexibility mechanisms of SoSs and, accordingly, identifies needs for flexibility that SoSs can meet. Following that, it proposes a hierarchical network as a more flexible SoS architecture for complex or distributed large-scale systems. Then, decision problems for forming and evolving a SoS network are defined. A case that involves integrating distributed renewable energy sources with the main grid is presented to illustrate the implementation of the proposed methodology. Results from this study support the idea of acquiring and maintaining flexibility with SoSs. The paper also identifies research needs for advancing this particular use of SoSs

An Evaluation of the Organizational Structure of Air Force Emergency Operations Centers Using Social Network Analysis and Design Structure Matrices

The terrorist attacks on September 11, 2001 demonstrated that the United States\u27 emergency response capability, while robust, was disorganized in that organizations were not prepared or equipped to coordinate response actions across multiple agencies at a national level. This research investigates whether NIMS and the AFIMS structure is optimal for Air Force emergency managers, or whether, while maintaining NIMS compliance, there is a more effective way for the Air Force to organize its emergency management and response forces. Specifically this research focuses on the organization of the EOC and investigates whether shifting from the current structure of the ESFs to the FLOP structure found in the ICS may be a more efficient use of personnel based on the organizational requirements of the Air Force. This research will employ DSMs to independently evaluate the merits of both the ESF and FLOP construct for specific scenarios based on the tasks outlined in the Air Force\u27s CEMP 10-2. For seven of the eight scenarios examined, ESFs are reaching less than 60% capacity, in fact, most only reach 30% capacity or below. On the other hand, FLOP capacity is significantly increased, however, in some of the more demanding scenarios, capacities exceed more than 100%

Tradespace and Affordability – Phase 1

One of the key elements of the SERC’s research strategy is transforming the practice of systems engineering – “SE Transformation.” The Grand Challenge goal for SE Transformation is to transform the DoD community’s current systems engineering and management methods, processes, and tools (MPTs) and practices away from sequential, single stovepipe system, hardware-first, outside-in, document-driven, point-solution, acquisition-oriented approaches; and toward concurrent, portfolio and enterprise-oriented, hardware-software-human engineered, balanced outside-in and inside-out, model-driven, set-based, full life cycle approaches.This material is based upon work supported, in whole or in part, by the U.S. Department of Defense through the Office of the Assistant Secretary of Defense for Research and Engineering (ASD(R&E)) under Contract H98230-08- D-0171 (Task Order 0031, RT 046).This material is based upon work supported, in whole or in part, by the U.S. Department of Defense through the Office of the Assistant Secretary of Defense for Research and Engineering (ASD(R&E)) under Contract H98230-08- D-0171 (Task Order 0031, RT 046)

THE ROLE OF UNDERLYING MECHANISMS IN ACHIEVING CONSISTENT HYBRID COMBINATIONS OF COMPETITIVE ADVANTAGES

This thesis takes a step beyond the current discussion on hybrid competitive strategies (HS) by identifying the underlying mechanisms and common elements of successful hybrid strategies. Reviewing empirical and theoretical literature revealed a significant gap in this respect. Therefore, the activity-based view of strategy is introduced to the discussion on HS. In a first step, four consistent and sustainable HS concepts are developed providing the basis for deriving specific HS models. A second step identifies commonalities among these HS types and theoretically derives a synthesized, common HS model. Thirdly, the critical realist stance was selected for answering this thesis’ research questions addressing consistent HS concepts, implementations, common activities achieving external and internal fit, as well as common capabilities and resources supporting these activities. In a case study approach, semi-structured, open ended interviews combining appreciative and laddering methods are conducted with twelve interviewees from five firms. The separate analysis of ladder elements and ladders allowed distinguishing constitutional from relational elements. Based on this, fourth, an empirically revised research construct is substantiated. This research finds HS firms applying intended and consistent, but mixed strategy concepts based on generating high customer benefits through combining competitive weapons of differentiation and price or total customer cost. Moreover, HS concepts centre on three strategic building blocks: customer centricity, fulfilment of customer needs and employee orientation. Additionally, the research indicates that firms apply activities primarily for achieving fit. While all firms combine both views, no activities are directed to both fit types simultaneously. Activities deploy capabilities and resources in general on two adaptive and two absorptive mechanisms. Several practical implications derive from this thesis. First, firms can apply the synthesized model as a kind of ‘blueprint’ providing orientation for how to combine competitive advantages. Second, policy makers can apply the outcomes as principles steering firms or industries to ‘higher’ levels of performance. Last, firm managers can adapt their own as well as their firm’s behaviour accordingly

NEGOSEIO: framework for the sustainability of model-oriented enterprise interoperability

Dissertation to obtain the degree of Doctor of Philosophy in Electrical and Computer Engineering(Industrial Information Systems)This dissertation tackles the problematic of Enterprise Interoperability in the current globally connected world. The evolution of the Information and Communication Technologies has endorsed the establishment of fast, secure and robust data exchanges, promoting the development of networked solutions. This allowed the specialisation of enterprises (particularly SMEs) and favoured the development of complex and heterogeneous provider systems. Enterprises are abandoning their self-centrism and working together on the development of more complete solutions. Entire business solutions are built integrating several enterprises (e.g., in supply chains, enterprise nesting) towards a common objective. Additionally, technologies, platforms, trends, standards and regulations keep evolving and demanding enterprises compliance. This evolution needs to be continuous, and is naturally followed by a constant update of each networked enterprise’s interfaces, assets, methods and processes. This unstable environment of perpetual change is causing major concerns in both SMEs and customers as the current interoperability grounds are frail, easily leading to periods of downtime, where business is not possible. The pressure to restore interoperability rapidly often leads to patching and to the adoption of immature solutions, contributing to deteriorate even more the interoperable environment. This dissertation proposes the adoption of NEGOSEIO, a framework that tackles interoperability issues by developing strong model-based knowledge assets and promoting continuous improvement and adaptation for increasing the sustainability of interoperability on enterprise systems. It presents the research motivations and the developed framework’s main blocks, which include model-based knowledge management, collaboration service-oriented architectures implemented over a cloud-based solution, and focusing particularly on its negotiation core mechanism to handle inconsistencies and solutions for the detected interoperability problems. It concludes by validating the research and the proposed framework, presenting its application in a real business case of aerospace mission design on the European Space Agency (ESA).FP7 ENSEMBLE, UNITE, MSEE and IMAGINE project

A Model-Based Systems Engineering Approach for Efficient System Architecture Representation in Conceptual Design: A Case Study for Flight Control Systems

The reduction of the environmental footprint of aviation requires the development of more efficient aircraft. Emergent technologies in aircraft systems, such as more-electrical aircraft, are potential enablers for the next generation of aircraft. To support the adoption of these new technologies and to tackle the underlying integration challenges, aircraft system architectures need to be considered earlier in the aircraft design process, specifically within the conceptual design stage. To deal with the complexity and to make the system architecture development process more efficient and effective, a key enabler is to improve the representation of system architectures early in the design process. Introducing better architecture representations removes ambiguity and allows engineers to develop a shared understanding of the system. Model Based Systems Engineering (MBSE) has emerged as a systematic methodology to address complexity in systems design and overcome the drawbacks of the traditional paper based systems engineering approach used in aircraft development. This thesis investigates the use of the ARCADIA/Capella MBSE environment for the representation and specification of aircraft systems architecture in conceptual design. This thesis includes survey on the needs for system architecture representations in conceptual design. A methodology is developed within Capella to create architecture representations that are suitable for use in conceptual design. The primary flight control systems (PFCS), which by extension also includes the associated power systems, is selected to illustrate the proposed methodology. The proposed methodology consists of capturing architectural features such as interfaces, exchanges and variability. A catalog of modelling artifacts representing the various flight control actuation technologies at system level, logical and physical level has been developed. These elements can be combined to define any primary flight control system architecture. The model-based specification addresses the need to define rapidly many architecture variants for conventional and more-electrical technologies. The developed methodology is applicable to other aircraft systems. Overall, this work is an initial step towards introducing MBSE earlier in the aircraft development process thereby making it more efficient and responsive to the emerging needs of aircraft development

Enhanced integrated modelling approach to reconfiguring manufacturing enterprises

Dynamism and uncertainty are real challenges for present day manufacturing enterprises (MEs). Reasons include: an increasing demand for customisation, reduced time to market, shortened product life cycles and globalisation. MEs can reduce competitive pressure by becoming reconfigurable and change-capable. However, modern manufacturing philosophies, including agile and lean, must complement the application of reconfigurable manufacturing paradigms. Choosing and applying the best philosophies and techniques is very difficult as most MEs deploy complex and unique configurations of processes and resource systems, and seek economies of scope and scale in respect of changing and distinctive product flows. It follows that systematic methods of achieving model driven reconfiguration and interoperation of component based manufacturing systems are required to design, engineer and change future MEs. This thesis, titled Enhanced Integrated Modelling Approach to Reconfiguring Manufacturing Enterprises , introduces the development and prototyping a model-driven environment for the design, engineering, optimisation and control of the reconfiguration of MEs with an embedded capability to handle various types of change. The thesis describes a novel systematic approach, namely enhanced integrated modelling approach (EIMA), in which coherent sets of integrated models are created that facilitates the engineering of MEs especially their production planning and control (PPC) systems. The developed environment supports the engineering of common types of strategic, tactical and operational processes found in many MEs. The EIMA is centred on the ISO standardised CIMOSA process modelling approach. Early study led to the development of simulation models during which various CIMOSA shortcomings were observed, especially in its support for aspects of ME dynamism. A need was raised to structure and create semantically enriched models hence forming an enhanced integrated modelling environment. The thesis also presents three industrial case examples: (1) Ford Motor Company; (2) Bradgate Furniture Manufacturing Company; and (3) ACM Bearings Company. In order to understand the system prior to realisation of any PPC strategy, multiple process segments of any target organisation need to be modelled. Coherent multi-perspective case study models are presented that have facilitated process reengineering and associated resource system configuration. Such models have a capability to enable PPC decision making processes in support of the reconfiguration of MEs. During these case studies, capabilities of a number of software tools were exploited such as Arena®, Simul8®, Plant Simulation®, MS Visio®, and MS Excel®. Case study results demonstrated effectiveness of the concepts related to the EIMA. The research has resulted in new contributions to knowledge in terms of new understandings, concepts and methods in following ways: (1) a structured model driven integrated approach to the design, optimisation and control of future reconfiguration of MEs. The EIMA is an enriched and generic process modelling approach with capability to represent both static and dynamic aspects of an ME; and (2) example application cases showing benefits in terms of reduction in lead time, cost and resource load and in terms of improved responsiveness of processes and resource systems with a special focus on PPC; (3) identification and industrial application of a new key performance indicator (KPI) known as P3C the measuring and monitoring of which can aid in enhancing reconfigurability and responsiveness of MEs; and (4) an enriched modelling concept framework (E-MUNE) to capture requirements of static and dynamic aspects of MEs where the conceptual framework has the capability to be extended and modified according to the requirements. The thesis outlines key areas outlining a need for future research into integrated modelling approaches, interoperation and updating mechanisms of partial models in support of the reconfiguration of MEs

and Middle Tier Acquisition

Acquisition Research Program Sponsored Report SeriesSponsored Acquisition Research & Technical ReportsMajor defense acquisition programs take about eight years to proceed from program initiation to an initial operational capability. This cycle time is longer than it takes adversaries to create new problems for operational military forces. Prior statutory changes have not significantly affected cycle times. Recent changes created middle tier acquisition programs intended to deliver capabilities and products in less than five years. These middle tier acquisition programs are rapid prototyping and fielding pathways with new governance, acquisition authorities and schedule duration tied to requirements approval dates. The Department of Defense acquisitions continue to evolve, and program offices must concurrently adapt to both emergent guidance and programmatic realities. Including innovations such as system modularity and agile system development methods into these new program types can create additional programmatic schedule risks and opportunities. These in-stride adaptations can affect the capability of a program office to deliver an effective system within promised cycle times. This research explored schedule growth risks associated with new acquisition pathways and process innovations. It used public data to identify schedule-related risk factors associated with middle tier acquisition and process innovations. We developed quantitative schedule models for middle tier acquisition programs to predict schedule durations and schedule risks associated with application of various innovations within rapid acquisition pathways. We identified and analyzed schedule growth risk mitigation strategies. This research contributes to the understanding of the risks and opportunities associated with recent acquisition process changes. The research results will be useful to program offices and acquisition leadership in executing current and future rapid acquisition programs.Approved for public release; distribution is unlimited.Approved for public release; distribution is unlimited

Software Engineering Laboratory Series: Collected Software Engineering Papers

The Software Engineering Laboratory (SEL) is an organization sponsored by NASA/GSFC and created to investigate the effectiveness of software engineering technologies when applied to the development of application software. The activities, findings, and recommendations of the SEL are recorded in the Software Engineering Laboratory Series, a continuing series of reports that includes this document