ABSTRACT
The goal of data analysis is to identify causal factors, items of note, and underlying causes. The three tools that are used to perform this task are fault trees, 5-Whys trees, and causal factor charting. Using these techniques should help guide the data-collection process and make the overall investigation more efficient. Some investigations will only require the use of one of the data analysis tools. However, some investigations will require using two or three tools together. Often, the analysis is begun using one of the tools. Then, as the analysis progresses, other tools are used.
