The purchasing department is not a satellite of the company but is considered an integral part of the job order process when the material and processing requirements are passed to them.
Similarly, the flow of needs from all company departments can converge into the workflow manager, which assigns purchasing rules and budget limits to users and departments to centralize all company functions in the system.
Every document issued to suppliers (such as requests for quotations or purchase orders) is attached to the records for subsequent organized and computerized cataloging and reporting.