The best outcome of electrical design as design in general depends on the successful collaboration between customer and electrical designer. As the buildings get more sophisticated the main focus of the design slides to the smooth collaboration between the designers of the different technological parts. It is important to identify the needs and wishes of the customer first. As well to determine the possibilities that customer can allow. Electrical designer´s mission is to point clients` attention to the different aspects and options onto what ordinary people will hardly come planning their electrical systems. This complex initial data is for the electrical designer to form the electrical design following all the relevant latest standards and acts.

Aselectrical installation is only one part of the technological networks of the building it is important to cooperate with the rest of the designers of the technological networks (water and sewage, heating and ventilation, architecture, interior decoration etc). This way is gained the best outcome for the construction and ensured further harmonious construction process with optimized expense for time and labor. The harmonious collaboration of the different designers helps to prevent unwanted surprises that might emerge during the actual construction process. There may arise surprises like some ventilation devices do not have electrical feeding cables or heating system does not have proper automation cables etc. It makes times more expensive to resolve all this kind of errors during construction and can turn out that it is not possible to provide the original design.