Ergonmic Checklists - Visual Displays and Dials
- Can the required data be obtained from display quickly with the required
- Are the scales correctly graduated and are as simple as possible;
not giving needless or spurious accuracy?
- Do the letters, numbers, graphics and markings conform to the relevant
standards in relation to the required reading distance; is the required
reading distance different from the normal reading distance?
- Are pointers and other indicators simple and clear, and do they allow
numbers to be read without obstruction?
- Are pointers mounted so that the visual parallax is minimized?
- Have great differences in brightness between displays, dials and
surroundings been avoided?
- Is the legibility of the display impaired by reflection of light
- Is the legibility of dials impaired by bright lights visible within
the same area of vision?
- Has shadowing by pointers, edges, or controls been avoided?
- Does the chosen numerical progression minimize reading errors?
- Is it possible to group the different categories of dials and displays
in different planes or surrounds of mounting?
- Can groups of displays of a specific category be divided by area
or color patterning; are the layouts of displays so contrived as to
highlight when the normal changes to abnormal?
- Are displays located near to their corresponding controls?
- Have the most important and/or the most frequently used instruments
the best position in the normal visual field?
- Are the most frequently used instruments grouped together in one
and in the same area of the visual field?
- Is the positioning of controls on similar machines or displays correctly
- Does reading of instruments require undue movement of head and/or
- Is the location and size of the display correct in regard to sitting
posture, arm reach and viewing direction?
Accuracy and speed:
- Is the accuracy of the instrument compatible with the required reading
- Are reading errors minimized by the design of the instrument?
- Is the time lag between changes in the system and indication of it
in the display minimized as far as possible?
- Are digital displays used for accurate reading and for adjusting
to a predetermined value?
- Is a moving pointer display used for estimation of the degree of
deviation and for adjusting deviation?
- Is the dial as simple as possible in regard to the desired information;
can colored zones (e.g. red, amber, green) be used instead of numbers
and markings when only check information is required?
- Is a satisfactory signal used to indicate the breakdown of a measuring
instrument; and is the knock-on effect whereby several alarms may occur
simultaneously avoided in favor of the most important?
- Does the grouping and arrangements of displays conform to the required
- Do pointers and other graphics point in the same direction when equipment
is working correctly?
- Does the direction of the movement display have a similar meaning
in different displays? Is the positioning of displays in different
colors the same where these panels serve a similar purpose?
- Is it possible to see immediately which situation is indicated by
the position of the control?
- Does the controlling hand impede the reading of the dial?
- Is it possible to indicate the zero position by a stop?
- Is it possible to recognize controls or visual graphics by means
of differences in shape, color or size?
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