write about 7 quality tools which are pareto chart, cause and effect diagrams, check sheets, histograms, scatter diagrams, run charts and control charts, and stratification. write paragraph for each tool in each paragraph have to include these 1- write brief history for each tool 2- usage for each tool (use for what, how, ….) 3- pros and cons for each tool (advantage ,disadvantage) References use Hard-ford style
