Background and purpose: The emergency department of a hospital is akin to its heart. where smooth operations can save many lives. This research aims to reduce patient waiting time in the emergency department using simulation techniques. Methods: This descriptive-analytical study was conducted cross-sectionally in 2019 at the Qaim Hospital in Mashhad. https://safeersappliancers.shop/product-category/neff-b57vs24h0b-slide/