"high level of usability" is correct and commonly used in written English, particularly in discussions about product design or user experience.
Example: The new app has been praised for its high level of usability, making it easy for users of all ages to navigate and use its features.
Formal security proof and usability analyses show that the proposed scheme is secure, efficient and has a high level of usability.
In doing so, the project met the criteria we set at the start of the course: an exciting, fast-moving, interactive electromechanical system with a high level of usability.
To achieve a high level of usability, a separate visualization knowledge layer could be added that specifies a suitable way of presenting each archetype node in a form.
Results indicate high levels of usability and customer acceptance for voiceprint authentication in telephone banking.
As for the first issue, the use of students as inspectors, we can argue that since the subjects possessed high levels of usability knowledge and usability inspection experience, they could be used as experienced inspectors.
Our tools use Asynchronous JavaScript and XML AJAXX) [13] because (a) it fulfills the required development agility, (b) it is able to create applications with high levels of usability from the user point of view, and (c) it has been widely adopted by the web development community.
The iPad was chosen over other types of tablets as it has a wide user base and high levels of usability compared to other tablet PC operating systems such as Windows and Android.
Although the technical improvements of these pot skirts are less than other cookstoves on the market, the higher levels of usability are likely to lead to a more positive end-user reaction, which could potentially lead to higher rates of adoption and impact.
The construction site layout (CSL) design presents a particularly interesting area of study because of its relatively high level of attention to usability qualities, in addition to common engineering objectives such as cost and performance.
With an emphasis on practical usability, we sought to develop a scoring system with a high level of discrimination that utilizes a small number of variables.
