While auditing purchase , check the following :
1.Check whether the Purchase Requistion is raised by the Stores and the material is required by the Plant . So that no excess raw material / stores item is maintained.
2.PO is raised for the same and qoutes are invited.
3.The most compartitive quote is chosed.
4.When the material comes inside the factory , GRN is prepared and the material is inspected . If any defects , what procedure is followed.
5.After inspection , the payment should be made as per Credit Period or to avail the discount payment can be made early . And in case of advance payment , who has authorised the payment.