B1 Description of the Data

Each line of the structural data corresponds to the description of an operator of the fault tree. For example, the line "G*143 G+139 G+140 G+141 G+142" will describe the inputs of the operator G*143, which are: G+139 G+140 G+141 G+142.

We identify the type of operator by the second character:

1. *: for an AND operator, i.e. "G*143".

2. +: for an OR operator, i.e., "G+139".

3. n/k: for a combination operator n/k, i.e., "G(3/4)112".

An event is designated by the letter "T" followed by:

1. N: normal.

2. C: complementary,

and its number, for example "TN252". ^[1]

B2 Fault Tree: Europe-1