Hi- the assignment from my professor is to identify 18 internal control issues from this flowchart. The only other information given is to check CoBIT levels 3 and 4, but unfortunately he has not given us that information. Can someone direct me to the appropriate documentation for CoBIT levels so I can identify the errors, or can someone explain what sorts of errors there are in the flowchart? Thank you!

MEDIUM SIZED MANUFACTURING COMPANY FLOWCHART OF RAW MATERIALS PURCHASING FUNCTION Controller's Division MANUFACTURING DIVISION STORES RECEIVING ROOM PURCHASE OFFICE ACCOUNTS PAYABLE A Purchase requisition Purchase requisition 1 Purchase requisition 2 1 2 By requisition no 3 B By requisition no Purchase Order Purchase order 1 To vendor 2 3 Purchase requisition 5 Purchase Requisition 4 Purchase order 5 3 Purchase order 6 By purchase order 1 4 By vendor 3 C Purchase order C Purchase order 3 6 1 Purchase order Requisition D 5 By purchase no 3 Requisition Explanatory Notes A - Prepare purchase requisition (3 copies) as needed B - Prepare purchase order (6 copies) C - Attach purchase requisition to purchase order. D - Merchandise received, counted and receiving report (3 copies) prepared based on count and purchase order. E - Match purchase order, purchase requisition, receiving report and invoice. F- Prepare voucher after comparing data on purchase order, invoice and receiving reports. G - To cash disbursements in controller's division for payment Purchase order Purchase order 3 Receiving report 1 Purchase order 2 6 1 Requisition From vendor By vendor Receiving report 1 2 3 4 Receiving report 1 Invoice F Invoice Voucher with documents E Receiving report 2 Purchase order Receiving report 1 6 1 Requisition Invoice By purchase order G