| Summary: | The telecommunication testing website developed and manage by PT Telekomunikasi Indonesia which aims to enable admin and customer to do the online test for their product. Online test save time and cost of testing. Some website functions found out did not operate effectively and efficiently. Usability Testing using User Centered Design (UCD) method is a research instruments in the form of draft interview, task scenario, and questionnaire. Variables used are Completion rate and Error to assess Website effectiveness, Task Time variable to assess website efficiency, and Satisfaction score variables by subjective questionnaire. Result of WEBUSE questionnaire, usability of website is 0.5825 categorized as moderate usability level (0.4 <x <= 0.6). The lowest usability is the User Interface Design category (0.55). The result conclude that the website need to be evaluate and improved. The time completion rate is 850 seconds and the error rate is high for task certificate download and complete the QA document. The highest task time is complete the registration form.
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