The Digestive System or often called the Gastrointestinal (GI) is the entry point for food, fluids, vitamins, carbohydrates and fats which are then absorbed in the intestine. The digestive system is a system that plays a very important role in the human body, consisting of several organs that have their respective duties and functions. The digestive system is a disease that is commonly experienced by everyone. However, people still consider it trivial regarding this digestive system disease. As a result, if left longer, it will cause chronic digestive system disorders. This study uses forward chaining and bayes as a method of statistical reasoning to calculate the probability between different decisions, using probabilities and values that accompany a decision. This expert system for diagnosing the digestive system can help people to carry out independent diagnoses but still be accurate so they can detect types of diseases of the digestive system. The built system is capable of diagnosing 7 types of digestive system diseases with 25 symptoms. So that based on 10 samples of diagnosing obtained an accuracy value of 100% of the appropriate case data. Keywords: Expert System, Forward Chaining, Bayes, Digestive System Abstrak: Sistem Pencernaan atau sering disebut Gastrointestinal (GI) adalah tempat masuknya makanan, cairan, vitamin, karbohidrat dan lemak yang kemudian di serap di dalam usus. Sistem Pencerrnaan merupakan sistem yang sangat berperan penting dalam tubuh manusia, terdiri dari beberapa organ yang mempunyai tugas dan fungsinya masing – masing. Sistem Pencernaan merupakan penyakit lazim di alami oleh setiap orang. Namun Masyarakat masih menganggap sepele terkait penyakit sistem pencernaan tersebut. Akibatnya jika di biarkan semakin lama akan menyebabkan timbulnya penyakit gangguan sistem pencernaan yang kronis. Penelitian ini menggunakan forward chaining dan bayes sebagai metode penalaran secara statistic untuk menghitung peluang diantara Keputusan yang berbeda, menggunakan probabilitas dan nilai yang menyertai suatu pengambilan keputusan tersebut. Sistem pakar diagnosis sistem pencernaan ini dapat membantu Masyarakat untuk melakukan diagnosis mandiri namun tetap akurat agar dapat mendeteksi jenis penyakit sistem pencernaan. Sistem yang dibangun mampu mendiagnosis 7 jenis penyakit sistem pencernaan dengan 25 gejala. Sehingga berdasarkan 10 sampel diagnosis diperoleh nilai akurasi sebesar 100% data kasus yang sesuai. Kata kunci: Sistem Pakar, Forward Chaining, Bayes, Sistem Pencernaan
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Aryaningsih et al. (2026) studied this question.
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