Average by itself doesn't tell much. Average and standard deviation computed over multiple samples from the population tells a lot. Learning about the various

Average by itself doesn't tell much. Average and standard deviation computed over multiple samples from the population tells a lot. Learning about the various types of standard control charts is quite useful for data-based decision making and monitoring the health of a process. Control charts and Pareto chart of root causes of defects are two of the basic tools one needs to establish 'basic stability' in a process. Basic stability is a requirement before working on improving a process.