Hi All,

My best understanding is that the Design History File (DHF) contains all information about the development of the the product, as the design is created. It contains all inputs, outputs, and protocols. The Device History Record (DHR) is contains everything that was done to manufacture the device. This includes, when it was manufactured, how many were made, and any identifying numbers associated with the device.

This site really helps to break it down nicely as well: http://blog.greenlight.guru/design-history-file-dhf-device-master-record-dmr-device-history-record-dhr

Hope this helps,
-Andrew Nashed