Patent ID: 9558298
Date: 2017-01-31
CPC Classifications: G06F

Claim:
1. A method of automatically reconstructing a sequence of interventions by human operators on equipment, comprising: recording in a log file events generated in the equipment as a result of the interventions performed by the operator, the events being recorded as sequences of elements in a list with each element having a timestamp, some of the events being superposed over each other in time; defining regular expressions representative of potential interventions on said equipment; approximate regular expression matching a sequence of elements in timestamp order in said list by locating an occurrence of one of said regular expressions in said list of elements with no more than a maximum number of matching errors and with the timestamps of said sequence of elements being within a predetermined value, each of said matching errors corresponding to an insertion within the sequence for one or more elements of the located regular expression and being associated with a regular expression different from the located regular expression; ascribing a group of elements in said sequence to the located regular expression if said located regular expression corresponds to said group but for the matching errors therein; removing from the list the group of elements defined by the regular expression located; leaving in said list those elements corresponding to said matching errors; and repeating said approximate regular expression matching, said ascribing, said removing, and said leaving in for a next sequence of elements in said list of elements.