Build a production planning model (or select a system which you want to work) with system dynamics theory which consists of at least 30 variables (e.g. your model can include stock, delivery, purchased quantities etc.)

1. Draw a causal loop diagram of your model. Show the relationships with sign. Number of loops must be at least 5. Example of causal loop diagram is shown below.
2. Draw stock and flow diagram.
3. Explain briefly your system dynamics model and discuss your results.