Example 5. Develop a system flowchart for a companys purchase order preparation Three source documents are involved in the data processing: (1) new vendor authorization forms, (2) new product authorization forms, and (3) authorized purchase requisitions. When a new vendor is approved, the vendor information from the new vendor form is keyed online through a computer edit program that creates a new vendor record on the vendor master file. Similarly, when a new product is approved, the information from the new product authorization form is keyed online though a computer edit program which creates a new product record on the product master file. When corporate purchasing agents (or other approved personnel) receive authorization to make a purchase, an authorized purchase requisition form is obtained. The information on this form is keyed into an online terminal which in turn connects to a CPU using a Prepare Purchase Orders program. This program (1) creates a computer record on the purchase orders pending file, (2) creates a multiple copy purchase order (at least one copy of which is sent to the vendor), and (3) creates a purchase order summary report.