Summary: Supply Chain Modelling

Read the summary and the most important questions on Supply chain modelling

• 1 In command, but not in control

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• What are the parts of supply chain dynamics?

  1. Supply -> operations management
  2. Network -> organization & management
  3. Dynamics -> system dynamics simulation

• view on performance evaluation shifts:

  Cost, volume
  
  to
  
  Quality, reliability, customer satisfaction

• approach to risks and problems shifts:

  Problem fixing, 'fire-fighting' agility
  
  to
  
  Problem prevention, high reliability

• 2 Models of man

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• What are the characteristics of stocks?

  1. Stocks characterize the state of the system (the snapshot test)
  2. Stocks provide the basis for actions
  3. Stocks provide systems with inertia and memory
  4. Stocks are the source of delays
  5. Stocks decouple rates of flow
  6. Stocks create disequilibrium dynamic

• Exponential decay: behavior over time (negative feedback loop)

  flow(s) = -g * stock(s)

• Negative feedback systems with explicit goals

  flow(s) = (S * - stock(s))/ AT

• There are in general two generic types of delays:

  1. Material delays: how the real world works
  2. Information delays: how the human mind works

• There are different types of systems archetypes

  1. exponential growth
  2. goal seeking
  3. oscillation
  4. s-shpae
  5. Overshoot & collapse

• 3 Boundedly rational

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• What are the rationality filters?

  1. Cognitive filters
  2. Behavioral filters
  3. Organizational filters
  4. Strategic filters

• Philosophers of science argue that any observation is theory-loaded

  1. The focus of attention is theory loaded:
  2. Observations are theory loaded
  3. Observations reports ar theory loaded