SIGRIC: Sistema di Gestione Rischio Chimico
A guided tour: Emergency Management
RTXPS the real-time expert system
guides the user through the management of the emergency.
Using a Rule Base, the expert system triggers ACTIONS
that suggest, step by step, appropriate management options to the operator:
compiling the necessary information from external or system internal sources,
establishing external communication links to institutions, field personnel,
or automatic sensors, and forecasting the evolution of the emergency.
The dialog with the expert system is based ACTIONS that display
both information for the operator as well as suggestions or
instructions for his activities.
Data are collected from the operator with a series of AskBox
windows, that present a specific question together with a set of
answers to choose from, sliders for numerical values, or a text entry facility.
To facilitate data entry, the expert system can offer its deduction
power in support of the operator: if a specific data item is
not readily known, a backward-chaining expert systems offers
related questions, until an appropriate answer to the original
question can be deduced.
Features such as display of the Rules processed, a Rule browser, and a
a back-tracking explain facility support the expert system dialog.
ACTIONS can also involve more complex functions such as data base queries,
data acquisition from on-line monitoring systems, external communication
such as calling or sending a fax; and running one of the built-in
emergency simulation and evaluation models: results from
the simulation models are shown as map overlays, and the evaluation of
the results (e.g., number of people exposed to a toxic substance) are
propagated to the expert system's Rules to derive further instructions.