Successful enterprise is like harmonious clockwork. Owing to clarity of all business-processes which is achieved at the expense of its automation at implementation of ERP systems class helps its harmonious work. Being corporative partner of "Parus Corporation", we realize implementation of "Parus-corporation" software for automation of the basic processes of enterprise resource planning and management. At the enterprises of JSC "Tatenergo" holding we implemented practically all modules of the given software complex, with the help of which are automated the processes of contracts makings and support, the processes of purchases and supplies, employment office work, accounting and management accounts, work of law services and many other. In the process of service the system is constantly improved, totally reflecting all changes in legislation and satisfying new users' requirements.