The document discusses various quality control tools and methods, including check sheets, which are used to record quality-related data over time. It also describes the seven main quality control tools: control charts, histograms, Pareto charts, cause-and-effect diagrams, scatter diagrams, run charts and stratification. In addition, it covers quality control aspects of aircraft engine overhaul processes like developing a schedule and program for the overhaul as well as implementing quality control procedures during the overhaul work.
