Method for updating risk analysis parameters of a technical system
AssigneesIon Beam Applications S.A., Friedrich-Alexander-Universität Erlangen-Nürnberg
InventorsDavid MENICHELLI, Andreas LÄMMERZAHL, Christoph BERT, Dominik KORNEK
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Abstract
A computer-based method for updating risk analysis parameters of a proactive risk analysis of a technical system, such as of an FMEA analysis for example. The method uses incident report data obtained during posterior operation of the technical system, compares these incident report data with data of the proactive risk analysis, and updates the said risk analysis parameters in function of said comparison.
Claims11
A computer-based method for updating risk analysis parameters associated to an FMEA risk analysis of a technical system, the method comprising the steps of:
- a. Retrieving stored data from the FMEA analysis of the technical system, said stored data including:
- a set of process steps associated with the technical system,
- a set of failure modes associated with said process steps,
- a value of an expected failure occurrence rate (Ro) and/or of an occurrence (O) associated with at least one given failure mode of said set of failure modes;
- b. For the at least one given failure mode of said set of failure modes:
- i. retrieving incidents from incident reports relative to the use of the technical system subsequently to said FMEA analysis;
- ii. associating said given failure mode to those retrieved incidents which are relative to said given failure mode, if any;
- iii. classifying each incident associated to said given failure mode, either as an event or as a near event, or optionally as a non-event;
- iv. calculating the sum (Ne+Nne) of the number of events (Ne) and of the number of near events (Nne) associated to said given failure mode and which occurred during a given time period (Δt);
- v. comparing said sum (Ne+Nne) with the value of Δt·Ro;
- vi. in the stored data of the FMEA analysis of the technical system, amend the value of the occurrence rate (Ro) and/or of the occurrence (O) associated to said given failure mode in function of the result of the comparison of step b)v.
Dependencies are inferred from the claim text.