week 5(Usuability engineering) Flashcards
(15 cards)
What is usability engineering?
Usability engineering is the process of designing systems that are easy and enjoyable for users to interact with. It systematically applies methods and metrics to evaluate and improve the user experience.
What are the key elements of usability engineering?
Iterative Design: Continuous feedback and improvements.
User-Centric Approach: Emphasizing user needs and behaviors.
List and describe the three main goals of usability.
Efficiency: Minimizing the time and steps required for users to complete tasks (e.g., task time, keystrokes).
Effectiveness: Ensuring users achieve their goals without errors (e.g., task success rates, error rates).
Satisfaction: The degree to which users find the interface pleasant and intuitive (e.g., surveys, feedback).
Give an example of efficiency in usability.
A streamlined checkout process in an online store.
Why does usability matter?
A:
Increases user engagement and retention.
Reduces user mistakes and improves task reliability.
Enhances task success rates.
What are the consequences of poor usability?
A:
Frustration and confusion.
Higher abandonment rates (churn).
Negative user reviews and lower adoption rates.
Name two metrics for measuring efficiency.
Task completion time and Keystroke-Level Model (KLM).
What is task success rate, and which usability metric does it belong to?
Task success rate is the percentage of tasks completed without errors. It belongs to the effectiveness metric.
What is heuristic evaluation?
A usability inspection method where evaluators examine an interface for compliance with usability principles (heuristics).
List two benefits of user testing.
Uncovering real user difficulties.
Collecting data on time, errors, and satisfaction.
What is the purpose of surveys and interviews in usability methods?
To understand user perceptions, satisfaction, and suggestions.
Name three of Jakob Nielsen’s usability heuristics.
Visibility of system status.
Match between system and the real world.
User control and freedom.
What does the heuristic “Aesthetic and Minimalist Design” emphasize?
Avoiding unnecessary information to prevent user overwhelm and maintain focus on essential elements.
Identify a violated heuristic and suggestion for improvement:
A:
Violated Heuristic: Consistency and standards.
Suggestion: Standardize icon design across the app.
In usability engineering, why is it important to reflect on evaluation findings?
To identify common heuristic violations, propose improvements, and understand unexpected insights from the analysis.
