http://video.google.com/videoplay?do...21695595&hl=en For those who can't be bothered to watch the video, they basically run the devices through every possible way of damaging them (multi-point bending, heat, moisture, dryness, immersion, splashes, repeated use, repeated tumbling, dropping from heights etc.) and keep doing that until they break. Then they study how the device breaks so they know where the weak points are and how they can be reduced.