The huge amount of data currently available to enterprises needs to be exploited to their advantage, as the lack of information can decide the future of the enterprise in the near future. On enterprises development in recent years has been greatly influenced by the rapid development of technologies for processing and organizing them. These technologies share the role of an information integrator to support decision-making at all levels of the manufacturing enterprise. Enterprise resource planning is a key transactional application of enterprise information systems. Its main features include the ability to automate and integrate key business processes, functions and data across the enterprise.

The aim of the paper is to create a theoretical and analytical basis for the topic of calculating the efficiency of the implementation of the purchasing process. This topic is the main subject of research and as the subject of research there are data on the cost of deployment and operation of Enterprise Resource Planning of the world's leading suppliers. The contribution is mainly in processing theoretical solutions of the problem based on study of available materials and designing various types of metrics for execution of purchasing processes.