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Building the Model

Step 0 Basic Building Blocks

Before you begin building your model, take a look at the basic building blocks that you will use to create the model:

Box Variable

Box Variables represent quantities. These are the main "nouns" in a system and are sometimes refered to as Level Variables.

Rate

Rates represent changes over time. These are the main "verbs" in a system and are sometimes refered to as Flows.

Auxiliary Variable

Auxiliary Variables represent constants and other parameters. These loosely corespond to "adjectives" and "adverbs" in a system.

Connector

Connectors indicate dependencies between objects. In other words, I need to know this to calculate that.

Basic Building Blocks


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Vensim PLE is a product of Ventana Systems, Inc.