First-In, First-Out (FIFO) Queuing is a CRM rule that assigns leads or service requests based on the order they are received, ensuring fairness and efficiency. This method prevents priority-based bias and ensures that all customer inquiries are addressed sequentially. FIFO queuing is commonly used in customer support ticketing systems, live chat services, and call center management. CRMs with FIFO queuing reduce wait times and improve service consistency by distributing workload evenly. Businesses implementing FIFO queuing can automate queue management, reducing manual assignment errors. AI-driven FIFO systems analyze queue patterns to optimize response efficiency, improving customer satisfaction.