This document outlines basic business processes for materials management (MM) in SAP, including: 1) Creating purchase requisitions, requests for quotation, purchase orders, and goods receipt/invoice verification. 2) Key transactions for each process include ME51N for requisitions, ME41 for requests for quotation, ME21N for purchase orders, and MIGO/MIRO for goods receipt and invoice verification. 3) Returnable and non-returnable gate passes are used to record internal and external stock transfers as well as returns, using transactions like MB1A, MB1B, and MIGO.