Guidelines

Checklist for Controls

No significant benefits  Minor benefits  Major benefits
The controls are large
There is enough spacing between controls
Colours are used to link information
The active controls are clearly distinguished from labels and displays
A typeface with good contrast on a plain background is used
The labels and instructions are large and clear
The labels are not obscured when the control is used
The icons are meaningful and simple
The control shape relates to its function
The controls can be operated in low illumination conditions
Finger / hand reference points are available
Push buttons have a concave surface
The controls are differentiated tactually
There is a raised dot on the number '5' of a numeric keypad
The controls can be used with one hand
The controls are multi-functioning
Frequently used controls are located between waist and shoulder height
Similar functioning controls are grouped together
There is a logical sequence of operations
Not a lot of force is required to operate the control
The screen and the controls are colocated
The interfaces, messages and labels are consistent
The interface can be customised / configured by the user
There is auditory output for key presses and feedback
There is volume control for the auditory output
There is a headphone socket for auditory output
Tactile feedback is provided
There is a facility for correcting input errors
Training is provided in the use of the system
There is an intelligent help facility
Instruction manuals are available in alternative formats

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