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. JURNAL TEKNOLOGI DAN OPEN SOURCE, v. 8, n. 2, p. 530 - 539, 6 Oct. 2025.