Web availability, accessibility, maintainability

Availability (Usability)

Usability is a multi-factor concept that involves easy learning, ease of use, system effectiveness, user satisfaction, and a combination of these factors with the actual use of the environment to target specific evaluations.

accessibility (Accessibility)

Accessibility refers to the readable and understandable nature of Web content for users with disabilities. Specifically consider the following two aspects:

1. The user agent must access the Web content, whether or not the user is disabled. Therefore, to improve accessibility, the first consideration is to consider a variety of user agents: Desktop browser, voice browser, mobile phone, car pc and so on.
2. You also need to consider the environmental limitations of users accessing Web content. For example: Noisy environment, dark or too bright room, or hands-free and other situations.

Maintainability (maintainability)

Maintainability refers to the difficulty of understanding, correcting, altering, and improving the software. The factors that usually affect the maintainability of the software are:

1. Maintenance personnel understand the software structure, excuses, functions and the ease of internal processes.
2. The ease of testing and diagnosing software errors.
3. How easy it is to modify the software.

Web availability, accessibility, maintainability