Hi, it depends on the level of dirt and moisture in your manufacturing area. On a clean assembly desk you may install just the cheapest PC with a keyboard, a trackball and a USB handheld scanner; after all it must just show a browser screen, no more.
In wet conditions, an expensive protected tablet may be required (touchscreen).
Moreover, what are you going to use: the good old Job card terminal or the new [lame] touchscreen Job card device?