Touch screens are appropriate for tasks involving the occasional selection of objects on position displays, layout diagrams, piping diagrams, discrete-function controls, or opening and closing valves.
Additional Information: Touch-screen devices are not recommended if the task requires holding the arm up to the screen for long periods of time or the entry of large amounts of data. Also, they should not be used for tasks that require frequent, alternating use of the touch screen and a keyboard, or long-term continuous data entry. Table 11.7 gives the advantages and disadvantages of touch screens.1472G, 5908
Table 11.7 Advantages And Disadvantages Of Touch-Screen Use
Advantages |
Disadvantages |
No separate input device |
Slower alphanumeric data entry |
Programmable interface |
Arm fatigue |
Fast access |
Finger may obstruct view |
Direct manipulation of targets |
Fingerprints or other debris may obscure screen |
Input/output in same location |
Large buttons required for finger use |
Intuitive |
Pointing is not very accurate |
Natural pointing action |
User must be within reach of screen |
Generally, no additional desk space required1 |
No tactile feedback provided3 |
Generally, no training required2 |
Unable to rest finger on target without actuation3 |
Gloved operation may be incompatible with some touch technology |
|
Controls must be deactivated for cleaning |
Note: Source is Table VI in MIL-STD-1472G (DoD, 2012).