Assessment on the Basis of Standards-Gaps and how to Bridge Them

Abstract

The standards IEC 65A(Secretariat) 122, 123 and CENELEC prEN 50126, 50128, 50129 can serve as the basis for development and assessment of safety critical systems in the automotive and in the railway sector. The safety measures described in these standards are not described in sufficient detail to be applied properly in the system. Standards which contain detailed descriptions of the safety measures would avoid the mentioned gap but they would grow in size and in complexity. This would decrease the lifespan of the standard and increase the delay between the technology and the appropriate standard. To avoid these disadvantages CASCADE proposes: the standards mentioned should become more generic and less complex. The gaps at the lower detailed levels could be closed by addition of well tried up to date examples. Such a collection of examples placed in an annex could be completed at short intervals without any changes of the actual obligatory standard. CASCADE is going to produce a short collection of examples for this purpose.