madachy / se4101-fault-tree-analysis

SE4101-Fault-Tree-Analysis

This repository contains resources for fault tree analysis using PyML. The file fault_tree_example.py shows an example creation of a fault tree diagram for the lamp circuit fault tree example shown below.

Spreadsheet Instructions

A fault tree can be defined in a spreadsheet using the following conventions and then read with PyML for analysis and visualization. The top event must be in the first row, but all other events can be in any order. They may be grouped by their event paths or by hierarchical levels as convenient. An event types can be a conditional and, conditional or, or basic event (leaf). The following are valid designations for event types:

Event Type	Acceptable Spellings
And	"And" "and" "AND"
Or	"Or" "or" "OR"
Basic	"Basic" "basic" "BASIC"

The example fault tree below is specified using the provided template file 'fault tree example.xls' shown underneath.

The provided template can be modified for new fault trees. Additional branch columns can be added as necessary.