Rigga
The point is that we use military standards to show that the equipment will survive the environment they will be operated in. The boxes need to be vibrated and still operate to show that when they are fitted to an aircraft they will continue to function, there is no point fitting a box that's going to shake itself to bits by the time you get off the ground!
Which standards are needed? Well some of it depends on the customer, but if you rock up to fit your new box onto an aircraft and it doesn't comply with the standards then it won't be allowed on!