Longevity: Expert systems can endure indefinitely, whereas a human expert may change or retire. Knowledge Distribution: Expert systems enable the distribution of human expertise across time and space. Aggregation of Knowledge: They can incorporate knowledge from multiple human experts, enhancing effectiveness. Cost Efficiency: Expert systems reduce the expense of seeking advice by providing expertise in various fields, such as medical diagnosis. Inferential Reasoning: Instead of using standard procedural code, expert systems handle complex issues by inferring new facts from existing knowledge represented as if-then rules.