CPIM Practice Exam

What is the main function of a fishbone diagram?

1. Cost buildup method

2. Method to determine the root cause of a symptom

3. Capability analysis

4. Synonym for a Pareto analysis

The correct answer is: Method to determine the root cause of a symptom

The fishbone diagram, also known as the Ishikawa or cause-and-effect diagram, is primarily utilized as a method to identify and analyze the root causes of a problem or symptom. Its structure resembles a fishbone, where the main "spine" represents the problem, and the "bones" branching off represent different categories of potential causes. This visual breakdown facilitates brainstorming sessions, allowing teams to systematically explore various factors that could contribute to the issue at hand. By categorizing causes, the diagram helps teams organize their thoughts and prioritize which factors may require further investigation. The focus on identifying underlying causes is crucial in problem-solving activities, enabling organizations to implement effective corrective actions rather than just addressing symptoms. While other options may seem relevant, they do not accurately reflect the primary purpose of a fishbone diagram. The cost buildup method, capability analysis, and Pareto analysis serve different functions and frameworks in quality control and process improvement, making them distinct from the purpose of the fishbone diagram in root cause analysis.