User-Centered Design and Usability Testing of an Air Handling Unit testing application

— User interface is a term used to describe the appearance of a computer or equipment that the user interacts with. User experience isn't just what consumers see; This can not only provide a design that appeals to the eye, but can also explain why the design is the way it is, a design that can make users feel comfortable when achieving their goals when utilizing the services provided by websites and applications. The purpose of this study is to find out whether the user centered design approach has a positive impact on the analysis and design of user interface and user experience on the Inspire Portal of Sam Ratulangi University.. Researchers have received the final results, namely, the mean value in the attractiveness aspect which was initially -1.61 the value became 0.71, for the second aspect, namely perspicuity (clarity) the initial value -1.72 rose to 0.68, and for the next aspect, namely the third efficiency value before improvement -1.67 to 0.61, and the fourth aspect dependability (accuracy) value before improvement -1.64 and after improvement the value became 0.67, The fifth aspect is stimulation before the improvement of the mean value of -1.64 after improvement to 0.58 and for the last aspect, namely novelty before improvement the value is -1.69 and after improvement the value becomes 0.64. The measurement tool in this study uses a user experience questionnaire, and for the final results of the benchmark comparison there are four aspects that are below average, namely attractiveness, efficiency, stimulation, and novelty. Key words — UNSRAT INSPIRE Portal; User Centered Design Methods; User Experience; User Experience Questionnaire; User Interface. Abstrak — User interface adalah istilah yang digunakan untuk menggambarkan tampilan komputer atau peralatan yang berinteraksi dengan pengguna. Pengalaman pengguna bukan hanya apa yang dilihat konsumen; Ini tidak hanya dapat memberikan desain yang menarik bagi mata, tetapi juga dapat menjelaskan mengapa desainnya seperti itu, desain yang dapat membuat pengguna merasa nyaman ketika mencapai tujuan mereka ketika memanfaatkan layanan yang disediakan oleh situs web dan aplikasi. Tujuan dari penelitian ini adalah untuk mengetahui apakah pendekatan user centered design memberikan dampak positif terhadap analisis dan desain user interface dan user experience pada Portal Inspire Universitas Sam Ratulangi. Peneliti telah menerima hasil akhir yaitu, nilai mean pada aspek attractiveness (daya tarik) yang awalnya -1.61 nilainya menjadi 0.71, untuk aspek yang kedua yaitu perspicuity (kejelasan) nilai awalnya -1.72 naik menjadi 0.68, serta untuk aspek berikutnya yaitu yang ketiga efficiency (efisiensi) nilai sebelum perbaikan -1.67 menjadi 0.61, dan aspek yang keempat dependability (ketepatan) nilai sebelum perbaikan -1.64 dan setelah perbaikan nilainya menjadi 0.67, aspek yang kelima yaitu stimulation (stimulasi) sebelum dilakukan perbaikan nilai meannya -1.64 setelah dilakukan perbaikan menjadi 0.58 dan untuk aspek yang terakhir yaitu novelty (kebaruan) sebelum perbaikan nilainya -1.69 dan setelah dilakukan perbaikan nilainya menjadi 0.64. Alat pengukuran dalam penelitian ini menggunakan user experience questionnaire, dan untuk hasil akhir dari comparison benchmarknya ada empat aspek yang dibawah rata-rata yaitu attractiveness, efficiency, stimulation, dan novelty. Kata kunci — Antarmuka Pengguna; Kuisioner Pengalaman Pengguna; Metode Desain yang Berpusat pada Pengguna; Portal INSPIRE UNSRAT; Pengalaman Pengguna.

An alternative solution for Indosport, considering the increasingly advanced smartphone development and also followed by the rapid growth of its users in Indonesia. The purpose of this study project is to produce a product in the form of a user interface (UI) and user experience (UX) design in helping to realize targeted mobile applications and not forgetting to apply the principles of visual communication design namely unity and variety, hierarchy, contrast, proportion and balance. The UI and UX design methods go through several stages of work in sequence: pre-production process, production process, and post-production. This design results in UI and UX designs that are equipped with user flow, interface designs, illustrations and prototypes. The main page of the Indosport mobile application is News, Activity, Calendar, and Profile which later on these pages there are several features that are different from the previous page. The making of this UI uses several visual languages such as medium close up, full shot, long shot, close up and medium long shot in the image section contained in the article as well as the depiction of field styles used to almost all visual UI elements. Using several principles in design, namely time to learn, speed of performance, rate of errors by users, retention over time, and subjective satisfaction. The resulting design forms will be distributed directly to the Research and Development division and the IT division from Indosport to be made a native.

The Food & Beverage (F&B) industry in Indonesia is growing rapidly, yet many mobile applications still fail to deliver an optimal user experience (UX) due to unintuitive user interface (UI) designs, inefficient ordering systems, and lack of integrated payment methods. These issues negatively impact user satisfaction and application usability. This study aims to design the user interface (UI) and user experience (UX) of a mobile food & beverage application that meets user needs, accommodates industry expectations, and is evaluated for effectiveness using the User-Centered Design (UCD) approach. The research employed the UCD methodology, involving user interviews, persona development, wireframing, prototyping, and usability testing. The evaluation was conducted using the System Usability Scale (SUS) with 15 respondents. The results show that the prototype of the “KuliNow” application achieved an average SUS score of 84, categorized as “Excellent.” Key features include integrated mobile banking payments, direct communication with restaurants, social media integration, pre-order functionality, efficient order management, and a reliable review and rating system. This study demonstrates that the UCD approach is effective in developing intuitive, user-focused mobile applications.

Re.wood is a wooden furniture business located in Tinggarjaya Village, Jatilawang District, Banyumas Regency that offers a variety of furniture products, ranging from chairs to wall hangings, to beautify interior and exterior spaces, but still has a limited market share. Re.wood currently uses a conventional sales process that is less effective and lacks information for customers, which causes a lack of sales levels for Re.wood. Designing a system before entering the system development stage is a must because it ensures that the resulting solution is relevant and effective in overcoming the problems users face. The problem can be solved by designing User Interface and User Experience of web-based e-commerce applications. The design method used by researchers is the user-centered design method. User-centered design is a method of focusing on the needs of potential users in the system design stage or process. The results of designing the user interface and user experience only include the user interface developed using Figma. The resulting website produces menus such as Home Page, login, Shop, Cart, Search, and Profile. This evaluation utilized the User Experience Questionnaire (UEQ) methodology to assess various aspects of the system. The resulting values (1.55 for Efficiency, 1.54 for Attractiveness, 1.49 for Clarity, 1.33 for Accuracy, 1.5 for Stimulation, and 1.15 for Novelty) represent the average UEQ calculation figures for each dimension. In other words, these numbers correspond to the results obtained through the UEQ, which helps evaluate user experience in terms of efficiency, attractiveness, clarity, accuracy, stimulation, and novelty. UEQ uses a Likert scale to measure user experience, and the resulting values show that the system performs well in most aspects. These findings indicate that the prototype meets the needs and provides a satisfying user experience.

The development of information technology today has developed very rapidly where in its development can help people from all walks of life in doing anything, one of which is in the laundry service business sector. My laundry is one of the businesses that offer Laundry services that provide kiloan washingservices. In My laundry In doing data collection or recording my laundry data still does manually. In solving the problems that occur in my laundry system the solution is to apply an information technology system that uses a website. In a design of user interface and user experience can be used as basic things in the creation of a website. In conducting analysis and design of user interface and user experience using the Human Centered Design (HCD) approach and user experience questionnaire (UEQ) method is expected to provide conveniencefor users of the website

Abstract: In the current digital era, transportation booking applications have become an integral part of people's daily lives. One of the preferred applications is the Suroboyo Bus Booking Application (GOBIS). GOBIS is a platform dedicated specifically to accessing Suroboyo Bus transportation services. However, with the advancement of technology and changing user needs, the GOBIS application also needs to be adjusted to remain relevant and meet expectations. Many users have complained about the application's ambiguous interface, unclear colors, and other issues. Therefore, a redesign of this application is necessary. This study employs the User-Centered Design (UCD) method and SUS testing to obtain a new design that can be implemented. The results show a significant improvement in application usability, with the average SUS score from users after the redesign process reaching 82.25, rated as "good" with a "B" grade. Comparing it to the usability score of the previous version, which only reached 57.25 with a "poor" rating and a "D" grade, indicates a substantial improvement. Thus, the new design demonstrates a significant improvement in usability compared to the previous version. Keywords: redesign; GOBIS aplication; user interface; UCD; system usability scale Abstrak: Dalam era digital saat ini, aplikasi pemesanan transportasi telah menjadi bagian tak terpisahkan dari kehidupan sehari-hari masyarakat. Salah satu pilihan utama yang sering digunakan adalah Aplikasi Golek Bis (GOBIS) Suroboyo Bus. GOBIS dirancang khusus sebagai platform untuk mengakses moda transportasi Suroboyo Bus. Namun, sejalan dengan kemajuan teknologi dan evolusi kebutuhan pengguna, perlu penyesuaian agar aplikasi Golek Bis tetap relevan dan memuaskan pengguna. Banyak pengguna mengeluhkan tentang antarmuka aplikasi yang kurang jelas, warna yang ambigu, dan masalah lainnya. Oleh karena itu, perlu dilakukan redesain aplikasi ini. Penelitian ini menerapkan metode UCD dan mengujikan SUS untuk mendapatkan desain baru yang lebih baik. Hasilnya menunjukkan peningkatan yang signifikan dalam kegunaan aplikasi, dengan nilai rata-rata skor SUS pengguna setelah proses redesain mencapai 82.25, dinilai sebagai "good" dengan peringkat "B". Perbandingannya dengan nilai kegunaan versi sebelumnya yang hanya mencapai 57.25 dengan penilaian "poor" dan peringkat "D" menunjukkan peningkatan yang signifikan. Oleh karena itu, desain baru menunjukkan perbaikan yang berarti dalam hal kegunaan dibandingkan dengan versi sebelumnya. Kata kunci: redesign; aplikasi GOBIS; user interface; UCD; system usability scale

This study investigates the application of User-Centered Design (UCD) principles in the design UI/UX for the mobile tourism application, 'Wisata Lombok.' The research aims to demonstrate how UCD can significantly improve user interface (UI) and user experience (UX) in context-specific applications. The methodology employed a multi-phase approach, including user research, persona development, iterative design. Data was collected through interviews with local and tourists, online surveys with Lombok residents, and on-site observations. This information guided the creation of user personas and informed the application's feature set and design decisions. Key findings reveal that incorporating local cultural elements into the UI design enhanced user engagement. The implementation of features like maps and cultural event calendars. Usability testing was carried out using an online questionnaire using the UEQ method. The UEQ contains 26 questions which structured in the form of a semantic differential, where each word consists of two terms expressing opposite meanings. The form was distributed to 35 respondents. All of the 35 respondents, 16 identified as male and 19 as female. The age distribution indicates that 29 respondents are within the 18-35 years old range, while 6 respondents are within the 35-56 years old. The UEQ result shows that the perspicuity and efficiency scale has the highest values, 2.29 and 1.96, falling within the “Excellent” range, indicating that the respondents didn't find any difficulties in operating the user interface. The attractiveness, dependability, and novelty scale fall within the “above average” value, indicating that the user interface was based on respondent needs. The stimulation scale has the least value 0.44 which fall within “bad” value , which means that the respondents was bored cause the user interface only has a few features.

Guidance and counseling services have an important role in moral assistance and directing students' talents and interests. The Covid-19 pandemic has hampered Counseling Guidance services because learning activities are carried out online. This study aims to conduct a UI and UX assessment of the counseling application based on the Cased Based Reasoning algorithm called B-Talk. This application was developed with a mobile platform design. Infernalities than the approach used is the User-Centered Design (UCD). The UCD approach is an approach that uses factors human, knowledge of usability techniques, and an interactive approach to developing design and systems. The UI(User Interface) and UX(User Experience) designs that have been produced will be tested with an expert assessment of Counseling Guidance which includes two aspects, namely usability testing and User Experience Question (UEQ). The media validation assessment was obtained from an average value of 89.2% of the standard feasibility without revision. In this case, it can be concluded that the B-Talk application design can be used as its function for Counseling Guidance media for adolescents.

Social Media platforms are increasing user engagements with their attractive User Interfaces (UI) design playing a crucial role in maintaining user involvement. Use of Emotional Intelligence (EI) into the UI transforming user interaction and engagement pattern significantly. With an emphasis on how design decisions affect user behaviour, this study explores the nuanced function of EIUIs (Emotionally Inteligence User Interfaces) in the context of social media. It specifically draws attention to the dangers of manipulative techniques like "dark patterns"-purposeful interface strategies intended to influence users to take actions they might not have otherwise taken-as well as the possibility of constructive involvement. By investigating these practices, the paper hopes to clarify the wider ethical consequences of interface design as well as the duty of platforms and designers to promote transparency, autonomy, and confidence in digital interactions. This paper aims to contribute to the discourse on user interface design by providing a comprehensive understanding of EIUIs' potential and pitfalls in the context of social media interactions. Additionally, this study focusses on finding information of the pattern of Emotionally Intelligent User Interfaces (EIUI) design to enhance user engagements emotionally and tend to take decisions and the impact of the design pattern in user experience.

This research paper delves into the integration of Firestore, a real-time NoSQL database provided by Firebase, with Android user interface (UI) and user experience (UX) design. The primary objective is to explore the extensive possibilities of utilizing Firestore to elevate the performance, responsiveness, and overall quality of Android applications. The paper thoroughly examines various techniques and best practices that leverage Firestore's real-time capabilities to optimize data synchronization, enhance UI responsiveness, and streamline UX interactions. By employing Firestore's real-time synchronization, developers can ensure that the data displayed in the UI remains up to date and consistent across devices, leading to a seamless and dynamic user experience. Furthermore, the research investigates responsive UI design, focusing on how Firestore's real-time updates can be leveraged to create highly interactive and immediately responsive interfaces. By utilizing Firestore listeners and reactive UI components, developers can enable real-time updates and ensure that the UI reflects the latest changes in the underlying data. Moreover, the research investigates how Firestore can streamline UX interactions by providing real-time feedback, notifications, and collaboration features. Firestore's real-time capabilities enable developers to deliver instant feedback to users, update them about relevant changes, and facilitate real-time collaboration among multiple users, thereby enhancing the overall user experience.

The era of digital transformation has made the MSME industry in Indonesia become technology literate, one of which is Husqy Petshop. Husqy Petshop is transforming by creating e-commerce which makes transaction accessibility easier. The development of the Husqy Petshop e-commerce application must pay attention to the right User Interface (UI) and User Experience (UX) so that it can be used by users comfortably. User Interface (UI) and User Experience (UX) are two important aspects of application design that play a role in the interaction between users and products. Good UI/UX design is obtained by using a method that takes into account the appearance and user experience, one of which is User Centered Design (UCD). The Husqy Petshop application, which applies the User Centered Design (UCD) method, does not only focus on technical aspects, but also considers user needs, preferences and experience. The test results using the Single Ease Question (SEQ) method produced an average score of 6.89 which states that the appearance of the Husqy Petshop Application is easy to use.The aim of this research is to provide recommendations for interface designs that suit the needs and are easy for users to use.

The purpose of this study is to discuss approaches for developing human–computer interaction (HCI) in educational technology (ET) based on definitions of visual design, learning variables and user-interface design principles in the field of instructional design and technology (IDT). We will do in several stages, first, we will review historical definitions of HCI and its developments in education and considerations for defining visual literacy for learning with instructional design (ID) models. Then, we will review each definition of visual principles for user interface design (UID) or user experience design (UED) and learning from screens. HCI and its roles with the perceptional approach will be discussed as previous definitions in the type of theories such as cognitive load, activity and paying particular attention to primary concepts included in each definition based on the ID model approach. We will also present some of the historical criticisms of the definitions, which provided designing and developing user interfaces. The process should indicate or address possible performance design approaches in ID steps for developing learning and teaching in learning environments as well as developing UID or UED in ET. This also indicates approaches in philosophy of ET and its theory, definition and applications of new technologies as well as UID or UED perspectives and visual design variables. In this study, we review the visual design techniques from past to present that multimedia project design teams should follow the strategies and rules for designing learning environments in industry, business and military based on philosophy of ET and HCI design with ID models by using the newest technologies. The process compares both understanding global UID or UED requirements and visual strategies and considerations for research and product design by ID models. The steps include recognising terminology in ET practice concept, psychological, technological and pedagogical foundations in ID as well as ET approaches and using visual rules for conducting multimedia projects in last decays. At the end of the study, conceptions of ET, ID models and HCI will be discussing to indicate design standards for multimedia projects in the field of IDT. We will also present the relationships between ET and designing problems for creating instructional materials in education. All steps in visual design, UID, UED and HCI design based on philosophical approaches and evaluations in the field are given at the end of the study. Keywords: User interface design, visual designs, human–computer interaction (HCI), user experience design, educational technology, IDT

This research aims to create a User Interface (UI) and User Experience (UX) design so that people become easier to buy food at Culinary UMKMs using the Design Thinking method which has several stages, namely the Emphatize, Define, Ideate, Prototype, and Testing stages. The Design Thinking method is used to create solutions to solve problems felt by users. In conducting testing, the study used Usability Testing and tested 10 respondents who would provide an assessment through testing using the Single Ease Question which has a test result of 6.7 out of 7, and testing using the System Usability Scale which has a test result of 93 out of 100, which can be concluded that the UI / UX design of mobile-based food sales applications for MSMEs in the city of Manado can be used properly by respondents, and can provide solutions to existing problems.

Traditional screen-based interfaces are evolving into a new era due to rapid technological advancements and shifting user needs. At the core of this evolution lies Anderson's 1989 vision of computer technology becoming transparent and invisible to the user. Similarly, in the mid-1990s, Weiser laid the foundation for this transformation by arguing that the fundamentals of human-computer interaction should be reconsidered. He proposed that a “disappearing” or “invisible” form of computing offers a more natural and manageable mode of interaction between humans and machines. In the 2000s, Rosalind W. Picard contributed to this discourse by asserting that, if computers are to engage in natural interactions with humans, they must be equipped with the ability to recognize, understand, and even express emotions. She advocated for computers that not only respond to user commands but also proactively act based on the user’s emotional and physiological states. These perspectives collectively form the foundation of the concept of Screenless Interfaces. With the proliferation of the Internet of Things (IoT) and the advancement of human-machine interaction, user experiences that do not require screens are gaining prominence. Screenless Interfaces engage users through alternative sensory inputs such as voice, touch, motion, and other perceptual modes. These interactions provide users with natural, responsive, and personalized experiences, opening new possibilities in the field of User Experience (UX) Design and fostering direct relationships between users and systems. The aim of this study is to define the concept of Screenless Interfaces, which has become increasingly integrated into contemporary life, and to examine their impact on User Experience Design. To this end, a literature review is conducted to analyze the recent history of Screenless Interfaces and to explore their relationship with UX. Additionally, through the analysis of films and television series, the study discusses the innovative contributions and potential interface designs that Screenless Interfaces may offer to future interaction products. By presenting its findings, the study seeks to shed light on the concept and future of Screenless Interfaces, and to articulate their connection with User Experience Design.

An optical brain-machine interface (O-BMI) system using calcium imaging has various advantages such as high resolution, a comprehensive view of large neural populations, abilities such as long-term stable recording, and applicability to freely behaving animals in neuroscience research. The present study developed an ergonomic user interface (UI) design, based on a use scenario for an O-BMI system that can be used for the acquisition and processing of calcium imaging in freely behaving rodents. The UI design was developed in three steps: (1) identification of design and function requirements of users, (2) establishment of a use scenario, and (3) development of a UI prototype. The UI design requirements were identified by a literature review, a benchmark of existing systems, and a focus group interview with five neuroscience researchers. Then, the use scenario was developed for tasks of data acquisition, feature extraction, and neural decoding for offline and online processing by considering the sequences of operations and needs of users. Lastly, a digital prototype incorporating an information architecture, graphic user interfaces, and simulated functions was fabricated. A usability test was conducted with five neuroscientists (work experience = 3.4 ± 1.1 years) and five ergonomic experts (work experience = 3.6 ± 2.7 years) to compare the digital prototypes with four existing systems (Miniscope, nVista, Mosaic, and Suite2p). The usability testing results showed that the ergonomic UI design was significantly preferred to the UI designs of the existing systems by reducing the task completion time by 10.1% to 70.2% on average, the scan path length by 14.4% to 88.7%, and perceived workload by 12.2% to 37.9%, increasing satisfaction by 11.3% to 74.3% in data acquisition and signal-extraction tasks. The present study demonstrates the significance of the user-centered design approach in the development of a system for neuroscience research. Further research is needed to validate the usability test results of the UI prototype as a corresponding real system is implemented.