Definition
ARENA is a discrete-event simulation and automation software developed by Systems Modeling (now part of Rockwell Automation). It uses a flowchart-based modeling methodology built on the SIMAN simulation language.
Why It Matters
It allows engineers to test-drive massive logistics systems in a risk-free virtual environment, preventing multi-million dollar mistakes. It identifies bottlenecks and inefficiencies before a single physical machine is purchased.
Core Concepts
- Hierarchical Modeling: Allows users to build models at various levels of abstraction, from high-level “Basic Process” modules to low-level SIMAN code.
- Key Modules:
- Create: Defines entity arrival patterns.
- Process: Represents a delay, resource seizure, or release.
- Decide: Implements branching logic (probabilistic or condition-based).
- Dispose: Removes entities from the system.
- Input Analyzer: A built-in tool for fitting probability distributions to raw data (Chi-Square/KS tests).
- Output Analyzer: Provides tools for replication analysis, batching, and comparing multiple scenarios.