This search is for Extended Warranties on LG Duct-Free Systems (DFS) registered or purchased on this site only. For inquiries about Limited Warranty on DFS equipment, please contact LG DFS at: http://www.lg-dfs.com/contact-us.aspx.
Representative samples are designed to reflect characteristics or qualities present in the population and are important for accurate research. Representative samples are designed to reflect characteristics or qualities present in the population and are important for accurate research.
What is robust product design? Robust product design is a concept from the teachings of Dr. Genichi Taguchi, a Japanese quality guru. It is defined as reducing variation in a product without eliminating the causes of the variation. In other words, making the product or process insensitive to variation.