This accounting flowchart example was created on the base of the figure from the website of the Office of the State Comptroller. [osc.ct.gov/manuals/acctdirect/question03.htm]
"Purchasing is the formal process of buying goods and services. The purchasing process can vary from one organization to another, but there are some common key elements.
The process usually starts with a demand or requirements – this could be for a physical part (inventory) or a service. A requisition is generated, which details the requirements (in some cases providing a requirements speciation) which actions the procurement department. A request for proposal (RFP) or request for quotation (RFQ) is then raised. Suppliers send their quotations in response to the RFQ, and a review is undertaken where the best offer (typically based on price, availability and quality) is given the purchase order." [Purchasing process. Wikipedia]
The accounting flowchart example "Purchasing flowchart" was created using the ConceptDraw PRO software extended with the Accounting Flowcharts solution from the Finance and Accounting area of ConceptDraw Solution Park.