Ratnawati F, Hardinata N, Supendi. This study developed a Certainty Factor (CF)–based expert system to support nutrition consultation and stunting prevention in coastal settings using Bengkalis Regency as a case study. A design science approach was employed to analyze local service constra. JTOS [Internet]. 2025Oct.6 [cited 2025Oct.8];8(2):530 -539. Available from: https://ejournal.uniks.ac.id/index.php/JTOS/article/view/4858