Stuff%20we

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Stuff well need for the Midterm

• James Burns
• October 25, 2005

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The Adjacency Matrix
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Also known as the Square Ternary Matrix

• Be able to convert it to a causal loop diagram
• Be able to convert the CLD to a SDF
• Be able to write the rate equations associated
  with the SFD
• Assumes rates are multiplicative functions of
  their antecedents

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The Pension Fund Problem

• What sectors did you find?
• What stocks?
• What rates?

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Feedback

• Name two types
• Which type produces exponential growth?
• Which type produces exponential goal seeking?
• What is the discernment rule for distinguishing
  one type from another?

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What about delays?

• Cause ____ and ____ when ____ moves are applied
• Cause oscillation and overshoot when aggressive
  moves are applied

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Seeing the World Anew

• As wholes
• Seeing ourselves as part of the whole, part of
  the system
• Coping with Complexity mandates systems thinking
• Today, we are creating complexity at a frenetic
  pace

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When is dynamic complexity present?

• When there are dramatically different effects in
  the short vs. the long run
• When an action has one set of consequences
  locally and a very different set of consequences
  in another part of the system
• When obvious interventions produce non-obvious
  consequences

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The first Archetype

• Senge often says structures of which we are
  unaware hold us ____.
• All growth eventually ____.
• Which archetype illustrates this??
• Most managers react to the slowing growth by
  pushing harder on the _____ loop
• Instead, concentrate on the balancing
  loop--changing the _____ factor

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Structure
growing action
state of stock
slowing action
Balancing
Reinforcing
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VENSIM

• Know how to create CLDs
• Know how to create SFDs
• Know how to use the tools
• Know how to use the output iconsprint/plot/etc