https://www.omgwiki.org/dido/ 2026-06-25T09:39:16-0400 https://www.omgwiki.org/dido/ https://www.omgwiki.org/dido/lib/tpl/dokuwiki/images/favicon.ico text/html 2021-08-18T10:52:35-0400 Anonymous (anonymous@undisclosed.example.com) https://www.omgwiki.org/dido/doku.php?id=dido:public:ra:1.4_req:2_nonfunc:30_usability:effectiveness&rev=1629298355&do=diff 4.3.6.1 Effectiveness Metrics Return to Usability About There are two ways to calculate effectiveness: Count the success of completing tasks Count the errors while completing tasks Using Task Completion Rates Return to Top Effectiveness measures the ratio of tasks completed versus those that are not completed. It is usually reported as a simple percentage such as 80% of the tasks are completed. The data is collected using a simple binary (i.e., yes = '1' and no = '0') for each user for e… text/html 2021-06-11T14:52:38-0400 Anonymous (anonymous@undisclosed.example.com) https://www.omgwiki.org/dido/doku.php?id=dido:public:ra:1.4_req:2_nonfunc:30_usability:efficiency&rev=1623437558&do=diff 4.3.6.2 Efficiency Metrics Return to Usability About Efficiency is measured in terms of the time it takes to complete a task from when the task is initiated to when it is successfully completed. The units used to record the time must be uniform for all tasks (i.e., milliseconds, seconds, minutes, etc). text/html 2022-02-24T13:52:18-0400 Anonymous (anonymous@undisclosed.example.com) https://www.omgwiki.org/dido/doku.php?id=dido:public:ra:1.4_req:2_nonfunc:30_usability:satisfaction&rev=1645728738&do=diff 4.3.6.3 Attitude / Satisfaction Metrics Return to Top About Usability Metrics are generally done through standardized questions designed to capture a the user's sentiments about the application, product or system. The survey's pose questions to the users and provide a scale of acceptability the user chooses in assessing a particular attribute. The most common scale is based on the Likert Scales originally proposed in 1032