Owner / clientSee approved documents, receive them by distribution, and keep a defensible record of what was approved, by whom and when.
PMC / consultantReceive submissions by transmittal, assign discipline reviewers, decide with a review code and see which party owes the next response.
EPC contractorRegister drawings, run internal review gates, issue to the PMC, and receive the next revision automatically when a document comes back.
Document controllerOwn the register, issue revisions and transmittals, consolidate reviews, manage hard copies and export the record.
Reviewer / discipline engineerA clear task list, one place to record a code and comments, and delegation or alternates for leave.
Project administratorSet up the project, workflow, numbering, calendar and members; watch metrics; run backups and the close-out.