This document outlines 10 reasons to use simulation: 1. Make prompt and correct decisions by experimenting and getting fast feedback on complex systems. 2. Analyze improbable and dangerous scenarios safely to discover alternatives to unexpected situations. 3. Communicate operational capabilities efficiently to convince clients and analyze the behavior. 4. Teach new concepts and analyze resources, takt times, and production capacity through simulation. 5. Save money in the medium and long term by employing simulation for continuous improvement.