Simulator Architectures

OES Core 0

OES Core 0 (tutorial) is the minimal architecture for an OE simulator, supporting

• model variables
• object types and event types (including exogenous event types with recurrence/nextEvent functions)
• next-event time progression
• the uniform distribution as the only representative of probability distributions
• simple simulation experiments with the (unseeded) random number generator provided by the host programming language.

OES Core 1

OES Core 1 adds the following features to OES Core 0:

• fixed-increment time progression
• a seedable random number generator
• a set of sampling functions from various probability distributions (uniform, triangular, normal, exponential, etc.)
• multiple scenarios per model
• multiple experiment types per model
• model parameters
• parameter variation experiments
• persistent storage of experiment results

OES Core 2

OES Core 2 adds the following features to OES Core 1:

• activity types (e.g., MedicalExamination) with resource roles (e.g., doctor)
• planned activities queues
• resource pools