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,. The document defines four types of records that are important for medical device development and manufacturing: This document is a device master record index for an in vitro diagnostic product. Dmr is maintained on the company computer network in a microsoft word table, excel or equivalent format. A device master record is a collection of every document needed to manufacture, package, and possibly service a medical device.