User Interface Design and Ergonomics - National Open University of ...

MODULE 4
UNIT 1 TECHNIQUES FOR EVALUATING AND MEASURING
INTERFACE USABILITY
Table of Contents
1.0 Introduction
2.0 Objectives
3.0 Main Content
3.1 Usability Evaluation methods
3.2 Evaluation with tests and metric
4.0 Conclusion
5.0 Summary
6.0 Tutor Marked Assignment
7.0 Further Reading and Other Resources
1.0 INTRODUCTION
This unit describes usability evaluation methods. Cognitive modeling, Inspection, Inquiry
and prototyping methods and Inspection methods are described in detail. Evaluation
metrics are also discussed.
2.0 OBJECTIVES
By the end this unit, you should be able to:
Explain generally various usability evaluation methods.
Explain the differences between these various methods.
Describe evaluation metrics.
3.0 MAIN CONTENT
3.1 USABILITY EVALUATION METHODS
There are a variety of methods currently used to evaluate usability. Certain methods make
use of data gathered from users, while others rely on usability experts. There are usability
evaluation methods that apply to all stages of design and development, from product
definition to final design modifications. When choosing a method you must consider the
cost, time constraints, and appropriateness of the method. For a brief overview of
methods, see Comparison of usability evaluation methods or continue reading below.
Usability methods can be further classified into the following subcategories:
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