Simulation replicates physical tests in a virtual environment using software, enabling analysis of strength, heat, fluid behavior, vibration, and mechanism performance. It saves time and money by reducing the need for physical prototypes and testing, which often leads to over-engineering. Virtual testing produces optimized, lighter, and more efficient designs while fostering innovation by lowering risk and cost barriers. Industries such as oil and gas, sports equipment, electronics, and lighting use simulation to validate performance, durability, and thermal effects. Overall, simulation enhances product quality, accelerates development, and supports creative design exploration.