These are typically captured using a control chart -- a statistical tool used in manufacturing or business to show the extent of the variation in a process.

Using statistical control charts to analyze data from student evaluations of teaching. Decision Sciences Journal of Innovative Education, 1 (2): 259-272. McSweeney, L. A. 2006. Monitoring paper ...

Using a Pareto Chart for Root Cause Discovery Now that we’ve defined what a Pareto chart is and how the principle driving it works, it’s time to create your own.

How to Develop a Chart of Accounts for an Engineering Control Systems Integrator Company. Successfully managing an engineering control systems company requires an organized accounting system.