Composite Models are models that can be reused. Examples of Composite Models are: a Pump, a Heat Exchanger, a Flash Tank, a Total_Flow_Sensor. Composite Models can be constructed in a variety of ways and can be constructed to do a variety of things. Composite models:

1. always have a symbol
2. usually have a method (an interior)
3. usually have data items and

In this Section you learn to create a Composite Model. The working flow is illustrated for the creation of a Two-Stage Flash composite model. The composite model can be used to replace the sequence of two flashes in the Two-Stage Flash Case Model.

To build a composite model follow these steps