Fishbone Diagram

A fishbone diagram is one of the various tools that can be used to perform a cause-and-effect analysis. It provides a structured way to identify and organize the potential causes of a problem (or effect). It allows to establish and present the cause-and-effect relationship in an easy and understandable format. The word fishbone comes from its visual representation that looks like the skeleton of a fish. A fishbone diagram is one of the seven basic tools of quality. It helps to identify the root causes of an effect in order to identify an appropriate solution that can be effective. It is often used in Lean Six Sigma and other quality improvement methodologies to narrow down the area of analysis. The outcome of the fishbone analysis will provide useful information for later problem-solving tools.

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Affinity Diagram

An affinity diagram is a grouping method for classifying items together into meaningful categories. It is often used to capture and group the output of brainstorming and problem-solving meetings in order to provide better understanding of the topic discussed. It allows to classify a large number of thoughts for further review and analysis. The goal is to create a limited number of classified groups. An affinity diagram is commonly used during idea-generation and brainstorming sessions. It is also used during process improvement and problem-solving sessions when the problem is subjective and held in the minds of different people. It can also be used to organize the voice of the customer to find useful messages in customer statements. Feedback from customers is valuable information and needs to be organized in an appropriate manner to be useful.

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