When designing a list of items with associated actions what is the better approach?

1. Which usability principles are especially important in the design of help systems and why?

Which usability principles are especially important in the design of help systems and why?

The first and therefore most important rule is the observance of effectivity. An application should enable the user to work effectively by providing a suitable functionality for the completion of his task. The user is not overloaded with information and functions that are not necessary for his use case.