DHF contains all the design records from inception to launch and changes over time.DMR is one of the outputs from the DHFas It contains the specification that were developed during design process.Their difference resides in the phase of product life cycle ,DhFcovers the design phase and DMR is used during production phase .DMR contains information on design formulation,specification,complete manufacturing procedure,quality assurance requirement,acceptance criteria,packaging and labeling of a finished device.If the device remains original with no changes ,then DMR would be considered current DHF.