Suppliers are individuals and organizations that supply the enterprise with the resources they need and are important for the perfect functioning of the supply chain. Managing relationship with suppliers is one of the main jobs of each procuring profession. It is necessary to determine the characteristics that each supplier needs to possess in order to match the process of comparing with the competitors that supplier that perfectly matches all the characteristics. Various criteria apply in the process of comparison or selection of suppliers. Suppliers can be selected on the basis of one or more criteria. The choice of vendors based on multiple criteria (which is today's common trend) extends the decision-making process, as it collects more information about suppliers, and is more expensive for the company that is implementing it. Selected vendors can be evaluated, and when selecting a grading method, look at the market situation, types and work items, etc. Each supplier to continue working and contributing to the supply chain needs to be motivated. This is achieved through economic measures, personnel support, supplier's day, and communication. Suppliers are, by all authors, the most important factor in the process of supply and as such need particular attention.