Framework and Model of Usability Factors of Mobile Phones

Abstract

This chapter aims at developing a framework and model for identifying and organizing usability factors of mobile phones. Although some studies have been made on evaluating the factors, there is no systematic framework for identifying and categorizing them. This chapter proposes a conceptual framework which has multiple views to explain different aspects of the interaction between users and mobile phones, and which describes the world of usability factors based on these views. The multiple views include user view, product view, interaction view, dynamic view, and execution view. Furthermore, based on the conceptual framework, a multi-level hierarchical model which classified usability factors in terms of goal-means relationships was developed. Next, two case studies are described, where the usefulness of the framework and model could be confirmed. Lastly, a set of checklists which make the framework and model more practical were developed.

Key Terms in this Chapter

Usability Indicator: Hypothetical, abstract conceptual constructs affecting usability that cannot be directly measured

Usability Property: Usability metrics related to the actual user interface of a particular mobile phone

Abstraction Hierarchy: A multi-level knowledge representation framework for describing the functional structure of a particular work domain or system

Usability Factors: A thing that influences users’ perception of usability

Usability Criteria: Sub-indicator that can be directly measured by at least one specific usability property

Graphical User Interface: Interface related to graphical or visual items presenting information needed for users to conduct tasks

Logical User Interface: Interface concerned with information contents and structure for carrying out tasks

Physical User Interface: Tangible, physical interface supporting physical operation needed for executing tasks