7.1.4 Minimize the input actions
Using fewer input actions provides greater productivity and fewer chances for error. It is
preferable to make a choice by a single keystroke, mouse selection or a single finger
press, rather then to type in a string of characters. Since the users competence regarding
computers varies, and a wish for more mouse input actions has come up during the
interviews, this is an important aspect.
As a lot of the user’s interaction with the Operations Monitor will be dealing with the
retrieval of information, and because of the relatively low amount of user input through
keyboard, it is preferable to use the mouse as the main source of input. Keyboard
shortcuts can be provided as a complement, if an advanced user wishes to use the
Operations Monitor in a quicker fashion. Keyboard entry will naturally still exist, for
example when the user enters information into the database. There should also be the
possibility for the user to customize own macros.
Make it possible for the user to regret action by providing an “undo” or “back”
button. The Operations Monitor should strive to make it impossible, or at the very least
difficult, to make mistakes. Having the possibility to undo actions will greatly increase the
trust the users have for the system.
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