Risk Tree Analysis Quiz

Failure nodes and Logical nodes

Failure nodes are represented by circles or rectangles depending on whether they are basic or decomposed further into causes

In the case of an AND node, the causing child nodes must all occur for the parent node to possibly occur as a consequence. In the case of an OR node, only one of the causing child nodes needs to occur for the parent node to possibly occur as a consequence.

<p>Risk checklists and guidewords can be used to capture patterns of failure through specific words and to identify failure nodes in a risk tree.</p> Signup and view all the answers

<p>In the most general case, risk trees are directed acyclic graphs where one child failure node may be causally linked to multiple parent failure nodes.</p> Signup and view all the answers

<p>The cut set of a risk tree is the set of all minimal AND combinations of least events or conditions, each of which is sufficient for causing the root failure node. It is obtained by taking all leaf nodes of another tree, called the cut set tree, derived top down from the risk tree.</p> Signup and view all the answers

<p>Failure nodes in risk trees are identified using risk checklists and guidewords, which capture patterns of failure through specific words such as 'NO', 'MORE', 'LESS', 'BEFORE', and 'AFTER'. These patterns help in identifying the failure nodes.</p> Signup and view all the answers

<p>In directed acyclic graphs of risk trees, one child failure node may be causally linked to multiple parent failure nodes.</p> Signup and view all the answers

<p>The cut-set tree is another tree derived top down from the risk tree, where the top node of the cut-set tree is the top logical node of the risk tree. It contains all the leaf nodes used to obtain the cut set of the risk tree.</p> Signup and view all the answers

<p>Examples of specific words used as guidewords to capture failure patterns in risk trees include 'NO', 'MORE', 'LESS', 'BEFORE', and 'AFTER'.</p> Signup and view all the answers