Samenvatting Class notes - Systems Engineering

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Samenvatting - Class notes - Systems Engineering

  • 1461016800 Systems Engineering V1

  • Chart: action Field of Product Creation:
  • Systems Engineering is an interdisciplinary approach and means to enable the realization of successful systems. It focuses on defining customer needs and required functionality early in the development cycle, documenting requirements, then proceeding with design synthesis and system validation while considering the complete problem. (INCOSE)

    Systems engineering is a methodical, disciplined approach for the design, realization, technical management, operations, and retirement of a system. (NASA-Handbook)

    Systems engineering consists of two significant disciplines: the technical knowledge domain in which the systems engineer operates, and systems engineering management.(Department of Defence)
  • Summary: SE is an interdisciplinary and holistic method to develop systems while considering all aspects of its life-cycle.
  • What is a System?

    Oxford Dictionaries: A set of connected things or parts forming a complex whole, in particular

    James N. Martin: System means a set of integrated end products and their enabling products.

    Benjamin S. Blanchard: An aggregation or assemblage of objects united by some form of regular interaction or independence 
      
    INCOSE: A combination of interacting elements organized to achieve one or more stated purposes. An integrated set of elements, subsystems, or assemblies that accomplish a defined objective. These elements include products (hardware, software, firmware), processes, people, information, techniques, facilities, services, and other support elements.
  • Sketch the triangle of aspects on life cycles.
    System integrity requires that these three aspects are in balance and given equal emphasis at all decision gate reviews.
  • 1461621600 Exercise 1

  • Sketch the extended V-Model for the Lawnmower.
    Conceptualize, elicit requirements 

    prototype, produce, sale
  • The V-Model from SE sight
    Baseline?
  • What is a Use-Case? Sketch am example.
    A use case contents a number of procedures, which show how the system is used and which situations/messages it needs to deal with.

  • The environment model: (Consens based)
    The model describes the embedding of the system to develop in it`s environment. The system is considered as a black box and interrelated with elements of it`s
    environment with whom it is interacting or from whom it is influenced.
    Elements are:
    • System elements of the environment
    • System elements
    • Energy flow
    • Material flow
    • Information flow 
    (Flows: disruptive&normal)
  • Die Wirkstruktur beschreibt den grundsätzlichen Aufbau und die Wirkungsweise des Systems. Sie ist Bestandteil der Prinziplösung mechatronischer Systeme und lässt sich aus geeigneten Kombinationen von Lösungselementen zur Erfüllung von Teilfunktionen mittels des Morphologischen Kastens ableiten.

    Elements of effect structure:
    System elements (multiple/simple)
    • Energy flow
    • Material flow
    • Information flow 
  • Structure 
    The structure shows the real relationship's between different elements. The relationships do only show real mechanical connections.
  • 1462226400 Systems Engineering V2&3

  • What is a Blackbox, Whitebox and Greybox?
    A Blackbox does only look at the in- and output. The rerelation of both can only be described stochastically.

    In a Whitebox the system will be shown, with all causes and effects in between the input and output. (Mathecally possible)
    -> high complexity

    The Greybox is a Blackbox with a subsystem seen like a Whitebox.
  • What is systems thinking?
    Systems thinking is a mind-set of reducing complexity.
     
    Uses describing terms for relations and overviews

    Includes model-based approaches for simplifying
    complex systems as much as it is necessary and adequate

    Is based on an overviewing approach of thinking about
    relations
  • What kind of different system views are there?
    Depending on the approach the views can be divided

    In the engineering process different departments have different views on a developed product
  • What is a 'Life cylce' (always for Soi). Name difference between technical and economical view on life cycles.

    Economical view starts with product launch, systems engineering starts from the very first idea

    • every system has a life-cycle, even if it is not formally defined
    • life cycle refers to the System-of-interest
    • life cycle is structured in stages
    • every stage of a life-cycle ends up with a decision gate
    • the Systems Engineer is responsible for the individual planning of the system life-cycle (tailoring process)
    • Systems Engineering processes on the beginning of the life-cycle, but keeps track for the whole life-cycle
  • INCOSE Definition: System of systems applies to a system‐of‐interest (Soi) whose system elements are themselves systems; typically these entail large scale inter‐disciplinary problems with multiple, heterogeneous, distributed systems.
  • Life cycle (per ISO/IEC 15288)

    “A system progresses through its life cycle as the result of actions, performed and managed by people in organizations, using processes for of these actions.”
  • How do identify a System of System over a System of interests?
    • Operational independence of constituent systems
    • Managerial independence of constituent systems
    • Geographical distribution
    • Emergent behavior
    • Evolutionary development processes

    By working together the systems generate greater benefits than by the use of every system on its own
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Voorbeelden van vragen in deze samenvatting

What is a Blackbox, Whitebox and Greybox?
3
What is systems thinking?
3
What kind of different system views are there?
3
What is a 'Life cylce' (always for Soi). Name difference between technical and economical view on life cycles.
3
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