Ok, so this is a pet peeve of mine, please don't call them tablets. They are not tablets. They are Allen Bradley PanelView Plus 1000 Terminals. The technology is resistive technology, not capacitive technology. Everyone is used to capacitive touch screens (such as a iPad, Nook, most cell phones, etc). These screens are no where near the level of sensitivity as what everyone is used to with their normal devices. These are designed for an industrial application where you may be moving different machines and they don't want to be moved accidentally. Therefore resistive technology is appropriate for that because you need to be sure to move or start a machine. So when they are applied in a situation when a referee is overloaded, they are not going to take the time, nor do they have the time to verify that the push on the screen is actually made. Remember 80% of the time it's a process problem, not a people problem.
Here's the information on the Panel View
http://ab.rockwellautomation.com/Gra...lus-1000#/tab2
And how it's resistive technology.
http://www.ab.com/en/epub/catalogs/1...-Terminal.html