[en] The operators of power plants have learnt in almost 100 years, since the first thermal power plant was erected, how to coordinate human power to one joint effort. They have learnt to solve their problems with the parties concerned, and to do that of which they know how it is done, in a rational way. On the basis of their constant exchange of experience concerning the planning, construction, and operation of power plants, they will continue to elaborate their own recommendations, codes of practice, and guidelines which are to serve safety and availability, which are to reduce subsequent faultfinding, and which are to promote greater economy. Furthermore, on the basis of their extensive expert knowledge they are to cooperate, within the framework of their possibilities, in drawing up statuatory ordinances, regulations, and technical rules in the hope that this work can be done jointly by all concerned. The operators are aware in this context that the expert knowledge and experience of their staff have to take care, above all, for the so-called back-fitting. (orig./HP)