Ratnawati, F., N. Hardinata, and 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, Vol. 8, no. 2, Oct. 2025, pp. 530 -39, doi:10.36378/jtos.v8i2.4858.