Statistical quality control in the thermal analysis (TA) laboratory is an integral part of good laboratory management. The rate determining step in the analysis of production samples can be customer and/or supplier/vendor input. The major task of a quality thermal analysis laboratory is satisfying the client with accurate and precise information. Control charting oxidative properties in hydrocarbon fluids is a technique to assure stability of the thermal analysis system. The composition of drain oils or the thermal stability of fluids can be ascertained by thermogravimetric methods. These procedures have been monitored with statistical process control charts. Special cause, "out-of-control" cases, will be discussed. Laboratory management can be improved by knowing the sample volume of completed thermal analysis tasks on a day-to-day or yearly basis. This information can be used to expand resources, such as automated (robotic) thermogravimetric analyzers, dual-sample differential scanning calorimeters, or additional personnel.