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This study aims to develop a web interface for a digital wedding invitation service provider (Fairytale) using the User-Centered Design (UCD) approach. The research method follows the UCD approach, consisting of four main stages: (1) understanding the context of use, (2) identifying user needs, (3) designing solutions, and (4) design evaluation. Data collection involved 36 respondents through questionnaires, interviews, and usability testing. The findings highlight three key functional requirements: template customization (94.4%), guest list management (88.9%), and digital RSVP (86.1%). The implementation of UCD resulted in significant improvements in usability metrics: task success rate increased from 65% to 91.7%, error rate decreased from 35% to 8.3%, and user satisfaction rose from 3.2 to 4.3 (on a 1-5 scale). Mobile-first optimization became a central focus, given that 72.2% of users prefer accessing the platform through mobile devices. This research contributes to the development of the UCD model for digital platforms in Indonesia and provides practical guidelines for user-centered interface development. The study's limitations include a small sample size and a geographically focused scope, suggesting opportunities for future research with a larger scale..

The purpose of this research is to evaluate the usability of the website by students of Amikom University Purwokerto using the usability testing method. In today's digital world, websites have become the primary tools for communication and information for educational institutions. Therefore, it is important to ensure that the website meets the needs and expectations of users. The methods used in this study include data collection through a questionnaire designed to measure five key variables: learnability, efficiency, memorability, errors, and user satisfaction. This questionnaire was distributed to students to gather comprehensive feedback regarding their experiences while using the website.The research results indicate that there are many aspects that need improvement to enhance the user experience, including ease of navigation and the speed of information delivery. The lower scores on the memorability index suggest that users experience difficulties recalling how to use certain functions after not visiting the website for a certain period. Additionally, several performance issues and errors were found that could hinder users from achieving their goals on the website. We hope that these findings can provide useful recommendations for the development of educational websites to be more efficient and user-friendly. Given the negative aspects identified, it is hoped that the user experience can be improved so that the website can function as a source of information and services for students.  

Distance learning has become a supporting tool in education in the digital era. Improving the quality of education requires changing new, more efficient learning methods by designing E-Learning applications for learning media. The Manado State Christian Institute already has an Information System platform which aims to facilitate student registration and administration. To improve the quality of education, an E-Learning application is needed. The aim of this research is to design an E-Learning application as a distance learning platform that facilitates communication between students and lecturers in accessing material, assignments, challenges and exams. System design is carried out using Unified Modeling Language (UML) based modeling. Based on the results of usability testing, a score of 95.2% was obtained, which means that the E-Learning application is very good to use based on the experience of 5 respondents representing the Manado State Christian Institute.

This study focuses on the design of the user interface (UI) and user experience (UX) for a pizza shop application using the Design Thinking method. Aiming to enhance convenience and efficiency in the ordering process, the method involves five stages: empathize, define, ideate, prototype, and test. The UI design is developed to ensure an attractive and user-friendly interface, while the UX emphasizes ease of navigation and user satisfaction. The resulting prototype includes essential features such as product menus, shopping cart, and order tracking. Usability testing shows that the application effectively simplifies online pizza ordering, improving the overall shopping experience for users.

Hipertensi merupakan salah satu penyakit tidak menular yang umum terjadi di dunia. Salah satu penyebab umum hipertensi adalah pola makan yang tidak sehat. Dalam menanggapi hal tersebut, Dietary Approach to Stop Hypertension (DASH) disarankan sebagai pola makan yang efektif untuk mengurangi tekanan darah. Meskipun telah terbukti efektif, penderita hipertensi masih belum dapat menerapkan pola makan tersebut secara konsisten. Salah satu faktor penghambat penerapan pola makan DASH adalah ketidaktahuan penderita hipertensi dalam memodifikasi pola makan sesuai anjuran yang ada. Berdasarkan permasalahan tersebut, penelitian ini bertujuan untuk merancang pembuatan aplikasi pola makan DASH bagi penderita hipertensi berbasis mobile yang dapat memberikan rencana makan sesuai pola makan DASH. Rencana makan dalam jangka waktu tujuh hari yang dibuat setiap harinya meliputi sarapan, makan siang, dan makan malam. Menu makanan akan dirancang dan disesuaikan dengan jumlah kebutuhan kalori harian. Penderita juga dapat memantau asupan natrium sesuai dengan makanan yang telah dikonsumsi. Sebelum mengembangkan aplikasi, usability testing dilakukan menggunakan metode heuristic evaluation untuk mengevaluasi desain pada prototype. Pengembangan aplikasi dilakukan menggunakan metode waterfall model dengan arsitektur BLoC. Aplikasi mobile dikembangkan menggunakan bahasa pemrograman Dart, framework Flutter, Bloc, Firebase, dan Edamam untuk sistem operasi Android. Pengujian black box kemudian dilakukan dengan metode functional testing. Setiap fitur yang diujikan berhasil berjalan sesuai yang diharapkan dan dinyatakan lolos pengujian. Hasil penelitian menunjukkan bahwa aplikasi Milda dapat digunakan oleh penderita hipertensi untuk menjalankan pola makan sehat dengan memberikan rencana makan sesuai dengan pola makan DASH. Rencana makan yang diberikan mendorong penderita hipertensi untuk memulai atau mencoba kembali pola makan DASH. Selain itu, variasi menu makanan yang menarik juga mendorong penderita hipertensi untuk lebih konsisten dalam menjalankan pola makan DASH.

The ornamental fish market is growing rapidly due to the great interest in the hobby of keeping ornamental fish which is supported by technological advances.  Unfortunately, these technological advances also include problems that are still experienced by sellers and buyers, such as a lack of understanding of how to send fish and a lack of information about trustworthy sellers.  This research aims to formulate user needs and create an ornamental fish marketplace application interface using the Design Thinking method with good usability values.  This research discusses creating application interface designs using the Design Thinking method which focuses on users to overcome the problems above.  This research produces interface designs for 21 features with the main feature being a community that makes it easier for sellers to interact and displays ratings on stores to make it easier to find trustworthy sellers.  This research was carried out in two iterations, with the final test results in the second iteration being 92.85% (Learnability value) and 91.15% (Efficiency value) for five sellers.  Test results for five hobbyists / potential buyers obtained a Learnability score of 97.14% and Efficiency of 92.72%.  Meanwhile, Satisfaction (SUS) for both got a score of 83.5%.  The test results produced a good usability design.