12.1.1.3.1-1 Maximum Viewing Distance

Users of large GVD devices should be able to resolve all important display details at the maximum viewing distance.

Additional Information: The maximum viewing distance for large GVD devices should be based on an analysis of the information requirements of individuals and their locations in the work area. Application of this criterion should consider the types of information contained in the GVD, the ways in which this information is used by individuals, and the locations of these individuals relative to the display. For example, supervisors may only need to read high-level indications from their workstations while operators may need to read more detailed information. Evaluations that use this criterion should consider the reading and viewing requirements of personnel who may be seated at the greatest distance from the large-screen display. Considerations include: (1) do the individuals need to resolve all details or merely be able to detect changes that require additional scrutiny, and (2) will some or all of the large-screen display information be available on separate displays located closer to these individuals.2090