Techniques for statistical formal activity analysis with consideration of temporal andor spatial correlations are described herein. Preferably, the polymer has the general formula nj-. A check valve may be incorporated into the lower end of the mud saver spool. When the urine valve is oriented to permit communication with the fluid source, an infusion pump may be used to infuse a known quantity of fluid through the urine valve and into the patient’s bladder. Triggering events can be defined for initiating aggregation of such history data with additional data, which enable a processapplication to retrieve the operational metric data of the industrial unitentity from any of a plurality of systems operatively coupled to such industrial unitentity.