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Display (Screen (Visibility of content (Depend on how far it is kept…
Display
Screen
Screen Visibility
Visibility of content
Depend on how far it is kept
Maximum visibility
If Touch Screen
What is the minimum and maximum time to interact with product
Allow 5th percentile user of the population can touch the tp of the touch screen without having to lift the upper arm away from the torso and still allow it to be placed high enough that its lowest is no more than 45 degree below the horizontal line of the 95th percentile user.
Hand movement ,Top to bottom & left to right
Alignment
Video
Can refer to other similar device in the market
Horizontal
Ratio (dimension)
Depend on the content
Image
Audio based only
Big Data
Vertical