Electrical and instrument equipment could be managed using an electrical 
structure like electrical cabinets, compartments, and finally electrical 
circuits, to which electrical signals belongs. An electrical structure enables 
electrical and instrument work and preventive maintenance to be successfully 
carried out. Easy access to information about electrical structures is important 
during maintenance and operation of a facility, especially for safety reasons. 
Any new installed/replaced electrical equipment must be carefully planned and a 
well-documented and described electrical structure is important input to these 
maintenance plans.
This structure could be created in two different ways: