understandability and adaptability

understandability is the prerequisite in order for users to perform any task.The better users understand an application, the more effectively they can use it because they know a greater portion of the application's functionality. This also leads to more efficiency because they can use functionality that achieves goals faster, with fewer steps, and fewer errors.

Understandability is closely related to learnability. The easier an application is to understand, the easier it is to learn and relearn. Understandability is also closely related to and an aspect of transparency. The more transparent an application is, the easier it is to understand, and vice versa.

We can make a application understandable by making the application small and simple.the task and its procedures are self-evident. The application is self descriptive.Feedback is given on user actions, system actions, and the system state, and there are no implicit or tacit assumptions about how users are expected to behave, particularly none that contradict users' expectations.

Adaptability is the degree to which adjustments are possible in practices, processes, or structures of system to projected or actual changes of climate. adaption can be spontaneous or planned,and can be carried out in response to or in anticipation of changes.

Adaptability/Flexibility refers to the ability to alter a course of action when new information becomes available.

To us as Humans we must possess both understandability and adaptability, understandability to understand changes, and adaptability to adapt to the the changes in the life.