Usability Evaluation of NutriData Dietary Analysis Program

Abstract

Usability is a sum of learnability, efficiency, memorability, errors, and satisfaction. There are many different methods for assessing usability. This master's thesis aims to assess the usability of the NutriData dietary analysis program (TAP) and create a development plan for 2023 based on usability issues found. The author assumed that there are several usability issues in TAP. The usability of TAP was assessed by heuristic assessment and usability testing. Using different methods was beneficial, as the results complemented each other and helped to prioritize the improvements. Six users' average SUS score was 68 points. The result gave TAP a rating between OK and good. Three NutriData team members conducted a heuristic evaluation. Individual assessment by several people was helpful since 35% of errors were detected by a single evaluator. Six participants took part in the usability testing. Interviews conducted during usability testing contributed significantly to the development plan. The development plan for 2023 includes almost a three-quarter of interview suggestions. The study revealed limitations of the study and helped to propose prospective methods to solve them.