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Table 2 Usability Objective and Subjective measures

From: Usability evaluation of mobile applications using ISO 9241 and ISO 25062 standards

Attribute

Metrics

Description

Effectiveness

Time to learn and use

Time to read the scenarios and to begin performing tasks

Data entry time

Time to enter the data necessary for the execution of a task

Tasks time

Time to accomplish given tasks

Response time

Time of having the response to the requested information

Time to install

Installation time of applications or its update

Efficiency

Number of errors

Number of errors made while reading scenarios and during the task execution

Completion rate

The percentage of participants who correctly complete and achieve the goal of each task

Satisfaction

Questionnaires

The QUIS v 7.0 (“Instrumentation” section)