Device master record (DMR) means a compilation of records containing the procedures and specifications for a finished device.
If we move further in the regulation, there is a detailed lists of items that the DMR shall contain:
The DMR can be considered as the collection of all the information needed to manufacture the devices. As per FDA regulation, it is acceptable that DMR provides reference to all the documentation covering those specific requirements, rather than physically collecting all the documentation in one place.
Device Master Record (DMR) and Design History Record (DHR)
The design history record (DHR) is rather different from the device master record (DMR). The DHR is the set of documents that demonstrates that the design process of a medical device has been performed according to the design plan and as per applicable regulations. The DHR typically contains, for example, design plan, design review, verification & validation test plan and test reports, design transfer, etc.
DMR for Software
The device master record shall contain specifications of the device. When the medical device is a software, this means that the DMR shall reference the software requirement specifications as per ISO 62304.
As mentioned before, the DMR shall also contain production process specifications. In case of SAMD, production process is very limited but, for example, it can contain instructions to publish the software on the web or SOP related to location of the binaries and configuration files of the version.
Moreover, if the software is delivered in a physical media, the DMR shall contain the labelling information of the specific media.
SOP related to maintenance and support process shall be mentioned in the DMR. Typically this includes the problem resolution process and issue escalation process.
Moreover, since the device master record shall include documentation related to installation and servicing, all the documentation related to software delivery shall be mentioned in the DMR. This can include, for example, installation instructions, training, support instructions etc.
Device Master Record (DMR) and Medical Device File
The Medical Device File is a new requirement which has been introduced in the ISO 13485:2016. There is quite a big overlap between the two documents, but basically we can say that the medical device file requested by the ISO 13485 corresponds to the DMR (a typical requirement from FDA) plus all the design documentation of the medical device (thus the Design History Record).