One of the seven Tools of Quality commonly referred to as the “fish bone” chart. It is a simple means of breaking down the Four M’s (Manpower, Materials, Methods, and Machinery) into the many components for further evaluation by given committees. Known as the Ishikawa diagram (named after the inventor, Kaoru Ishikawa), or with the acronym of CEDAC. This diagram allows firms to develop all causes of problem(s) pictorially and allows personnel to add cards at any point to identify possible solutions.