Expert System: Vertigo Disease Diagnosis with Backward Chaining Method

An expert system is a computer system that equals the decision-making ability of an expert. The aim is to transfer expertise or knowledge possessed by an expert poured into a computer application. Vertigo is not a common form of migraine or headache. Vertigo is a disease that causes the sufferer to feel a sudden spinning sensation inside or outside the head and the environment feels spinning. In this study using an expert system to diagnose vertigo which is classified based on damage to the vestibular system, namely Perifer and central vertigo. The process of diagnosis of the disease changes to the website where the user answers several questions raised by the system according to the symptoms felt by the user. The inference method used is the Backward Chaining method and data search using the Depth First Search method. This expert system is in the form of a website so that it can be easily accessed by users anytime and anywhere, this system is built with the Hypertext Preprocessor (PHP) programming language and MySql database. The system built is expected to be able to provide a conclusion based on the diagnosis based on the symptoms that have been answered, and provide information about the causes of the symptoms and solutions to treat the disease.