Integrity levels in automotive telematic systems

The authors describe how there are two current methodologies for assessing the safety of an automotive system. The first simply categorises the system as being either safety-critical or not. This second approach is to classify the system into one of `m´ integrity levels necessary for the development process. The value of `m´ is usually either 5 or 8. This method, ideally, minimises the cost of development to that which is necessary but no more. During the EC DRIVE I research programme, the project `DRIVE Safely´ used the IEC framework of five levels of integrity for advanced road transport telematic (ATT) systems