Defect Concentration Diagram is a graphical tool used to identify & mark the location of defects and then to analyze their causes. The defects are marked on a picture or a diagram of the product usually along with frequency of the defects.
An application-oriented question on the topic along with responses can be seen below. The best answer was provided by Mohamed Asif and Sourabh Nandi.
Applause for all the respondents - Mohamed Asif, Sourabh Nandi, Aritra Das Gupta, Sudhir Gayakwad.