Discover the fundamentals of usability and user experience (UX) evaluation in this 27-minute talk from LGM 2025. Learn about the human centered design process (HCD) and design thinking (DT) before exploring various usability evaluation methods. Focus on two key approaches: heuristic evaluation, where experts use checklists to identify issues, and usability testing, which involves end users completing specific tasks. Understand how these methods can be combined effectively to improve software usability, along with their respective advantages and disadvantages. Gain a basic understanding of usability/UX importance, learn about major evaluation methods, and discover how to apply these techniques to your own software projects. Ideal for UX/usability beginners and software contributors. Presented by Simon Harhues at LGM 2025.