ABSTRACT
Now the SRP/CS has to be designed using a validation procedure that requires a minimum reliability to be acquired in terms of Mean Time to Dangerous Failures (MTTFd).
Also other very important concepts have been developed in the new standards mentioned above. Such as the requirement of a Diagnostic Coverage (DC) and the design of systems which considers the Common Cause Failures (CCF). Trying to
1 INTRODUCTION
The design of Safety Related Parts of the Control System (SRP/CS) it is one of the emerging problems of the new standard requirements related to Machinery Directive (European Parliament and the Council of European Union, 2006).
