Nowdays the competition on business field is so tight. Companies compete to be the winner on that
competition. Competition is done by increase the quality of their product. Because now is the era of quality.
All business units have to find lagged indicator, leading indicator and sub leading indicator from their
business. All that indicators are arranged become fault tree. In order that the model can be used as a tool to
control the process, so its better that fault tree is developed become fishbone diagram.
Keywords: fault tree, fishbone diagram