<![CDATA[Grosirtani.id is a mobile-based application that aims to help supply vegetables for food stalls, catering, etc. This application is expected to help users overcome problems that exist in WhatsApp. But in the making, the Grosirtani.id developer makes applications without thinking about convenience in terms of appearance. Based on interviews with stakeholders, because most UMKM actors in the food sector are over the age of 30, this application is expected to have a display that is easy to understand by customers and functions that support its users. From these problems, this research uses the Goal Directed Design (GDD) method. Design evaluation is done by usability testing. Usability testing is used to determine whether the prototype design made can be used by users or not. The results of the usability testing evaluation have 6 task scenarios that must be done by 10 respondents. The results of usability testing get the efficiency metric value of 98.9% and the effectiveness metric value of 98.3%. With the help of the SUS technique the efficiency metric has two assessment results. The first result is acceptable ranges, grade scale, and adjective ratings. With an average score of 86.5 the assessment of acceptable ranges got an acceptable result, the grade scale assessment got a B value, and the adjective ratings assessment got an excellent score. The second assessment with percentile range. With an average score of 86.5 getting an A rating because the average result is above 80.3.]]>
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