These tools were either developed in Japan or introduced to Japan by the Quality Gurus such as Deming and Juran. Contextual translation of '7 qc tools' into Tamil. The second of the 7 QC tools is the Pareto chart is used to prioritize the contributors which make the biggest impact on a problem, or which represents the largest areas of opportunity.A Pareto chart is a tool to focus attention on priorities while trying to make decisions. 7QC tools even today owns the same popularity and is extensively used in various phases of Six Sigma (DMAIC or DMADV), in continuous improvement process and Lean management (removing wastes from process). Popularized by Ford Motor Company, the 8D methodology has proven to be highly effective in product and process improvement.