ABSTRACT
This chapter reviews some important clue-generating concepts that do not require a complicated statistical design or analysis. A concept sketch is any sketch, chart, visualization, or depiction that summarizes the thoughts of the investigator as to what is associated with the problem at hand. Illustrations and visualizations can provide useful clues when depicted on a concept sketch. Causes of fuel line assembly failure may be sketched to show the potential causal conditions. So concept sketches can be an important tool in generating clues or providing insights into what is causing a problem condition. The chapter shows some of the variations that can be experienced by components in a manufacturing process. It discusses how to create visual scoring systems and the use of concept sketches to describe and analyze problems. The chapter describes test particularities and shows that they could be augmented with the use of comparison of individual twins, twin sets, data ranking, fractional analysis, and basic analysis.
