A PDM system is used to control all the files associated your designs, in particular to manage CAD files and their complex relationships. CAD models require specialized file managers to create, edit and move file relationships. Item re-use often requires copying the physical file from one model to another, or coordinating several models.

​

A PLM system allows an organization to control all aspects of a product configuration. Objects in the PLM database can represent a physical part, assembly or document; a customer requirement or supplier part; or a design change. Useful properties over the object's design lifecycle can be recorded: part/document number, item category, revision, title, unit of measure, bill of materials, cost, mass, regulatory compliance details, file attachments, etc. These objects are linked to other objects to build a product structure.

​

Depending on vendor the features and scope of operation varies, to some extent, PDM and PLM systems overlap.