In article are presented the analytical dependences, characterizing general and fractional efficiency on the basis of the is likelihood-stochastic approach, allowing to plan experimental researches and to develop design procedures of dust removal devices of the enterprises for manufacture of road and building materials. Research of dust properties and optimization on basis of constructive and regime parameters allow to provide demanded efficiency of catching of a dust.

Keywords: "the is likelihood-stochastic approach, fractional efficiency, the dust removal device, optimization of parameters, manufacture of road and building materials "

In article methods of scientific forecasting of control systems by safety of work at the enterprises are presented. Forecasting allows to establish the most probable tendencies and directions of development of health and safety, to define possible alternatives of decisions of experts of protection services of work.

Keywords: Safety of work, method of scientific forecasting, projection, variability, information systems, difficult adaptive system, properties of systems, efficiency