Introduction
Background: Data Types
Sampling Size
Experimental Design
Data Analysis
Overview of Usability Metrics: Types of Metrics
Methods and Metrics
Summative vs. Formative
Choosing Appropriate Metrics. Performance Metrics: Task Success
Completion Time
Errors
Efficiency (clicks, pages, steps, etc.). Issues-Based Metrics: What is a Usability Issue; Severity Ratings
Test Biases
Reporting Positive Issues. Peferential-Based Metrics: Satisfaction
Ease of Use, Usefulness; Expectations
Standard Questionnaires. Web Navigation Metrics: Web-page Click-through Rates; Web page Abandonment RatesDerived Metrics: Task-based; Aggregate. Observational Metrics: Eye Movements
Stress; Facial Expressions
Other Observational Metrics. Case Studies. Special Topics: Six Sigma and Usability; Automated Methods
Discount Techniques
Server Log Analysis
A/B Testing. Conclusion: Communication to Management; Cost Justification; Industry Trends.