Not so long ago, so to speak, looking around construction work, it was possible to accurately determine which part of the work by which specialists would be performed. Today everything has changed so much that, firstly, the need for the station wagons, that is, those who owns two or more specialties has sharply increased. And secondly, in order not to do troubles, any specialist must at least approximately imagine what is happening in neighboring, so to speak, border areas.
