Division 2.5.8 The following specific definitions shall apply in reference to the ... quantitative design targets of technical systems:F1F2

The term ‘directly’ means that the failure of the function has the potential to lead to the type of accident referred to in point 2.5.5 without the need for additional failures to occur;

The term ‘potential’ means that the failure of the function may lead to the type of accident referred to in point 2.5.5;