summarize method of use effectiveness and efficiency are the most frequently employed usability metrics. survey from pargargh :

The existence of information systems and applications has changed the lifestyle of people around the world. The applications developed to serve specific purposes in the area of public transportation have made peoples lives much easier. The usability aspects of the applications have enabled users to use computers or mobile devices to find information about the services offered such as in the booking and ticket purchasing system. In this paper, a systematic review on the metrics and methods used to evaluate the usability of the applications related to public transportation systems are presented. The objective of this paper is to identify the metrics and methods employed by researchers and developers in conducting the usability tests and evaluation on applications related to public transportations. In total, 144 research papers were reviewed and out of the number, 22 most related research papers were selected. The results indicate that satisfaction, effectiveness and efficiency are the most frequently employed usability metrics. Meanwhile, survey seems to be the most popular usability method amongst researchers, followed by field testing and interview. The paper provides insights for professionals and researchers.

Systematic Review

A systematic review is a type of literature review that collects and critically analyses multiple research studies or papers. This section describes the methodology used to conduct this study in order to achieve its objectives. Systematic literature review is the selected methodology in conducting this study. This section encompasses the research questions, search strategy, and selection of related studies.

Discussion

Based on the literature review, there are numerous various usability metrics and methods used by researchers in conducting usability evaluation for applications related to public transportation systems. The most employed usability metrics are satisfaction, effectiveness, and efficiency. While for the usability methods, survey was found to be the most employed method, followed by field testing and interview. However, some data have been fused into a single type of data according to the context of the researches that have been conducted previously. For example, the term ease to use for usability metric is used in this paper to represent ease of use [6] and [3], simplicity [12], and simple interactivity [24]. While the terms comprehensibility [12] and easy to learn [3] are represented by metric learnability. The term user control and freedom [19] is used to refer to the metric flexibility based on the same context used. There are some metrics used in the literature review that reflected more on human behaviour rather than the usability of the application itself. For example, amount of time they spent waiting for transit, likelihood of walking [1] and experience [15]. These metrics are omitted in this paper. For the usability methods, the metric, observation, has been utilized, which represents the term field observation conducted by Ferreira & Freitas [3] based on the same context of use where users are free to voice out their opinions, feelings or frustrations while using the application.