And here it is only a rough estimate which depends on the type of terminal. For companies and firms with 50-100 employees, who work in one shift, enough is usually one terminal. In companies where work is performed in shifts, the number of terminals is determined by the employee number that makes the shift. Typically, for each group of 150-200 people in one shift is recommended use of two terminals - one for registrations entry event and the other for registration of exit event. For example if a company has 450 employees working in three shifts (150 employees per shift) it is recommended 2 terminals for the whole company, for a firm that has 900 employees (300 employees per shift) it is recommended 4 terminals for the whole company.