SAP MM overview and Procurement process

SAP MM is one of the most important module of SAP.SAP MM covers all the process required in purchase of goods and services,maintaining inventory and invoice verification.Purchasing process has the topics like requirement of goods,making requisition,requisition approval,purchase order generation,purchase order monitoring,change approval and receipt of goods and services. Inventory process covers the topics like goods receipt and goods issue,transferring of goods,physical inventory and inventory count. Invoice verification is the last process in SAP MM.  
Normal procurement process has the following steps:

• Determination of requirement
• Determination of source of supply
• Vendor selection
• Purchase order creation
• Purchase order monitoring
• Goods receipt
• Invoice verification