<![CDATA[The administration of livestock farmer groups by farmers in Jombang Regency is still conducted manually via WhatsApp and Google Forms, leading to documentation confusion, unclear submission status, and repeated revisions. This study aims to design the UI/UX of the Ternovia mobile application for farmers using the Double Diamond method with two improvement iterations. The research was conducted through four phases of Discover, Define, Develop, and Deliver involving three Farmer Group Leaders and two Farmer Members. Data was collected through observation and interviews, then analyzed using Empathy Map, User Persona, User Journey, and Pain and Gain Point. Evaluation was performed in two sequential stages: Usability Testing based on ISO 9241-11 as the basis for iteration 1, and Heuristic Evaluation by six evaluators as the basis for iteration 2. Usability Testing results showed success rates of 90.28% (Leaders) and 91.18% (Members), ORE of 84.96% (Leaders) and 91.63% (Members), and SUS scores of 85.83 (Leaders) and 87.50 (Members), all categorized as Excellent. Heuristic Evaluation identified 17 findings with the highest severity rating on the Consistency and Standards heuristic at 1,50. The application of Double Diamond with two iterations is proven effective in producing an interface design that meets farmers’ needs.]]>
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