System Dynamics

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System Dynamics

  1. 1. System Dynamics by Korolev Dmitry (372SE)
  2. 2. Table of Contents <ul><li>Introduction </li></ul><ul><ul><li>Understanding system dynamics </li></ul></ul><ul><li>Body </li></ul><ul><ul><li>Two types of feedback loops </li></ul></ul><ul><ul><li>Basic models </li></ul></ul><ul><ul><li>Computer tools for system dynamics </li></ul></ul><ul><li>Conclusion </li></ul><ul><ul><li>“ Research of potential of Powersim Studio for building system dynamics models” </li></ul></ul>
  3. 3. Understanding System Dynamics <ul><li>From any element in a situation you can trace arrows that represent the influence on another element. </li></ul>Object 1 Object 2 Link 1
  4. 4. Feedback Loops <ul><li>The objects in a system interact through feedback loops, where a change in one variable affects other variables over time, which in turn affects the original variable, and so on. </li></ul><ul><li>Two main types of </li></ul><ul><li>feedback loops: </li></ul><ul><ul><li>Reinforcing Loops (+) </li></ul></ul><ul><ul><li>Balancing Loops (-) </li></ul></ul>
  5. 5. Reinforcing Loops some effect causes more of itself +
  6. 6. Balancing Loops   the output of a system acts to oppose changes to the input of the system -
  7. 7. Combining Feedback Loops + + + - - +
  8. 8. Model Example
  9. 9. Modeling Tools <ul><li>Powersim Studio </li></ul><ul><li>AnyLogic </li></ul><ul><li>Simile  </li></ul><ul><li>… </li></ul>
  10. 10. Objectives <ul><li>To create a Russian guide to basics of system dynamics and Powersim modeling tool. </li></ul><ul><li>To build a sample model of a firm in Powersim. </li></ul>
  11. 11. Conclusion <ul><li>understanding the basic structure of a system </li></ul><ul><li>understanding the behavior a system can produce </li></ul>
  12. 12. ? [email_address]

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