The document discusses vendor selection and rating. Vendors are companies that sell goods or services and are part of the supply chain. Vendor selection is an important purchasing decision made based on factors like price, quality, delivery, production facilities, financial position, and performance history. Vendor rating evaluates and approves potential vendors through a quantitative assessment of their performance in areas such as delivery, quality, and price. There are three main methods for vendor rating: the categorical method which uses subjective evaluations, the weighted point method which allocates points based on factors, and the cost ratio method which calculates ratios based on procurement costs.