Simulation refers to a broad collection of methods and applications to mimic the be- havior of real systems, usually on a computer with appropriate software. In fact, “sim- ulation” can be an extremely general term since the idea applies across many fields, industries, and applications. These days, simulation is more popular and powerful than ever since computers and software are better than ever.

W. David Kelton - Randall P. Sadowski - Nancy B. Zupick 

Simulation is the creation of a digital twin using historical data and vetted against your system’s actual results. Simulation software uses methods and tools to help make simulation more convenient.

Rockwell Automation, Inc