What ultimately matters is subjective quality of experience
- Does the application meet user needs?
- Does the application allow users to communicate effectively?
- Does the application provide compelling entertainment?
QoE is not a one-dimensional metric
- What aspect of user experience are you evaluating?
- e.g., “Does it sound good” is not the same as “Can you understand it?”
- How does your metric relate to the task being performed?
- Some aspects of user experience can be estimated from technical metrics
- e.g., the ITU-T E-model for speech quality evaluation based on latency and packet loss
- Some aspects are subjective and task dependent – need user trials