It is imperative to understand the inherent differences between consumer grade and ultra rugged devices for use in industry and enterprise. Some may argue that a Sony Experia Z Cellphone is a waterproof(?) device but that does not make it rugged. It simply means that a specific type of disaster will not destroy the phone. In order to be a truly rugged device it is imperative that the device is evaluated (and passes) for the most extreme conditions it is likely to experience in daily use whilst performing the function for which it is chosen.