![]() The construction of the fishbone can branch off to as many levels as is needed to determine the causes of the underlying problem. These causes mimic the bones of the fish skeleton. The underlying problem is placed as the fish’s head (facing right) and the causes extend to the left as the bones of the skeleton the ribs branch off the back and denote major causes, while sub-branches branch off of the causes and denote root causes. Sometimes called an Ishikawa diagram or cause-and-effect analysis, a fishbone diagram is one of the main tools used in a root cause analysis.Ī fishbone diagram, as the name suggests, mimics a fish skeleton. In other words, it helps break down, in successive layers, root causes that potentially contribute to an effect. ![]() ![]() A fishbone diagram is a cause-and-effect discovery tool that helps figure out the reason(s) for defects, variations or failures within a process. ![]()
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