Abstract: Four threat levels reflect a prevailing risk and can be adjusted, for example, when local authorities advise of an increased likelihood of terrorist activity. Thus, a higher threat level in such system indicates a higher level of risk to a particular facility. In an embodiment of the invention, the behavior of the system changes with a simple adjustment to the threat level.

Abstract: A batch event historian gathers, stores and presents data regarding a batch process where relationships among the various elements of data are automatically derived by an executive program. A persistent store includes structure corresponding to the relationships defined among procedural elements and equipment in accordance with batch processing industry S88.01 standards. The executive program gathers event information generated by the batch process and derives the relationships among the events in accordance with these industry standard models. Storage and corresponding retrieval and presentation of such historical data is thereby simplified for a user because the user need not manually configure the historian programs to derive the relationships. Association of any continuous data log with event information is automated thereby obviating the need for manual configuration by a user to establish such associations.