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interaction experience as simple and intuitive as possible. Moreover, good user
interface design must
be
able
to
fulfill
the
user
needs
especially
for
office
environment.
The user
interface
is
everything
the
user comes
into contact
with
while
using
the system physically, perceptually, and conceptually. To the user, the user
interface is the system. The knowledge
the
user
must
have
to
use
the
system
(the
user’s
model)
includes
information
about
objects
and
functions
available
in the system.
The guideline for designing user interfaces include visibility and affordance.
Visibility means that a control should be
visible so
users know
it
is available
and that the control should provide immediate feedvback to indicate it is
responding. For example, button that can be clicked by a user is visible, and
when
it
is clicked
it changes
to
look as
though
it has been pressed, to
indicate
it is responding. Some buttons make a cliking sound to provide feedback.
Affordance means the appearance of any control should suggest its
functionality- that is, the purpose for which the control is used. On the
computer, a button affords clicking, a scrollbar affords scrolling, and
an
item
in a list affords selecting. If user interface designers make sure that all controls
are visible and clear in what they do, the interface will be usable.
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