Test for mistakes on a small scale Form an assault team to tackle the fatal quality problems of game - changing products, and drive the path to solutions with full - link data. This article tells the story of a company facing a fatal product quality problem with a persistently high defective rate... Experimental designTest for mistakes on a small scale PDCA and DMAIC methodologies provide structured solutions for solving daily and complex problems. The core of PDCA is a closed-loop of "Plan - Do - Check - Act", which is suitable for continuous optimization of daily problems... Data comparison checkSolidify effective measures