The Ishikawa diagram, also known as a fishbone diagram, is a visual tool used to identify and analyze the root causes of a problem. Developed by Kaoru Ishikawa in the 1960s, it helps teams systematically explore various factors contributing to an issue. The diagram resembles a fish skeleton, with the main problem at the head and potential causes branching off like bones. This tool is commonly used in quality management and process improvement initiatives. By categorizing causes into groups such as people, processes, materials, and environment, teams can better understand the complexities of a problem and develop effective solutions.