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5 Designing Paths for Entities

5-2

Role of Paths in SimEvents Models

In this section...

“Definition of Entity Paths” on page 5-2

“Implications of Entity Paths” on page 5-2

“Overview of Routing Library for Designing Paths” on page 5-3

Definition of Entity Paths

An entity path is a connection from an entity output port to an entity input port, depicted

as a line connecting the entity ports of two SimEvents blocks. An entity path represents

the equivalence between an entity's departure from the first block and arrival at the

second block. For example, in the model shown below, any entity that departs from the

FIFO Queue block's OUT port equivalently arrives at the Single Server block's IN port.

The existence of the entity path does not guarantee that any entity actually uses the

path; for example, the simulation could be so short that no entities are ever generated.

Even when an entity path is used, it is used only at a discrete set of times during the

simulation.

Implications of Entity Paths

In some models, you can use the entity connection lines to infer the full sequence of

blocks that a given entity arrives at, throughout the simulation.

In many discrete-event models, however, the set of entity connection lines does not

completely determine the sequence of blocks that each entity arrives at. For example, the

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MATLAB SIMEVENTS RELEASE NOTES Guía de usuario Pagina 92