Genichi Taguchi Is a Major Japanese Contributor to Quality Management

Genichi Taguchi is a major Japanese contributor to quality management. Which of the following perspectives or tools did Taguchi bring to QM?

A) He viewed any lack of quality as a loss to society.
B) Taguchi developed a "loss function" to measure the costs of quality losses that decision makers could use to guide their QM efforts.
C) Taguchi applied experimental design to quality assessment.
D) Each answer is a perspective or tool from Taguchi.