7.1.7 Make the users feel in control
It is important that the users feel that they are in control of the situation; part of this
means that they should have a correct mental model of the system, as described
previously, but also that they should be able to incorporate their own judgments and
experience into the system. For instance, the breaking of certain rules, perhaps not
allowed by the system, may become necessary. If this is possible, the user will feel that he
is more able to do his work correctly and easily.
Other ways to achieve this is to allow customization of the alerts. Enable the user
to sort the alerts. One situation might call for the alerts to be sorted chronologically (this
is preferably set as the “default” way of sorting). In other situations the user might find it
appropriate to sort the alerts by their priority, or destination airport.
Also allow the user to customize what time scope he wishes to work with, i.e. let
him or her choose for example 12h view, 24h view etc. The timeline should effectively be
as dynamic as possible, easily manipulated by the user.
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