Procurement is the acquisition of goods, services, or works from an external source. It aims to obtain the best quality and cost while promoting fair competition. Considerations in procurement include speed, cost, quality, constraints, risk, ownership, and financing. Public sector procurement uses contracts to increase efficiency and transparency. E-procurement systems manage tenders online globally. Procurement types include single, stock, vendor-managed inventory, just-in-time, and just-in-sequence. Procurement fraud can involve dishonestly obtaining an advantage during the procurement process.