A lot of the documents are not in the device master record, but are referenced in the dmr as to where the document is located (document control office, engineering library,. A device master record is a collection of every document needed to manufacture, package, and possibly service a medical device. Dmr is maintained on the company computer network in a microsoft word table, excel or equivalent format. The document defines four types of records that are important for medical device development and manufacturing: The device master record contains current device specifications and.