抄録
The prospect of technical measures to obtain higher reliability of man-machine-system was discussed from ergonomic viewpoints. Quantification of the human reliability is necessary and may be applicable for system designing, although more efforts should be made in this respect. Mechanization of human performances as well as ergonomic measures to guarantee good working conditions are essential. Analysis of human characteristics in task performances is still very poor as to their reliability and should be further promoted. Examples of airplane accidents, human control activity, teaching machines and others were also discussed.