PEAR TREE, PAIR TREE. GET IT? That play on words may not be the best, but it's useful for remembering and visualizing this method. Fault pair trees are good for doing Why? brainstorming for problems. They not only give you a way to organize the possible causes of a problem in a logical and visual pattern, but also help you think creatively about those causes so that you can gain insight into the problem and its solution.
HOW TO uSE THE FAULT PAIR TREE
The Basic Method
Fault trees are not developed in a simple, linear method—they don't grow neatly and they require reworking over time. It's a creative process. Therefore the following ...