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1、Goodmorningeveryone!Itismypleasuretogiveapresentationhere.Asastudentwhosemajorissafetyengineering,Idliketointroduceasafetyevaluationmethodtoday,theLECevaluation.AsthePPTshows,mypresentationismainlydividedintothreeparts.Firstly,letmeintroduceLECbriefly.MaybesomeofyouhavelearnedaboutLECincollege,itisu
2、sedtoassessthedegreeofdangerwhenpeopleworkinpotentiallydangerousenvironment.Itisahalf-quantitativesafetyevaluationmethodwhichclassifiesonecertainsystemanddetermineifthesystemissafeenough.Then,whatdoeseachlettermean?Dmeansdanger,itshowshowdangerousthesystemis.Lmeanslikelihood,itshowsthepossibilityoft
3、heaccident.Emeanstheextentofexposure,itshowsthathowoftendoworkersworkindangerousenvironment.Cmeansconsequence,itshowstheseverityofaccidents.Here,itisachart,eachpartisdividedintoseverallevels.Takethelikelihoodasanexample,ithassevenlevels,thepointsrangefrom0.1to10asthepossibilityrising.Andifthescoreof
4、Disover320,itmeansthissystemisextremelydangerousandcannotcontinueoperating.ThroughLECevaluation,wecanmakesureifweneedtorectifyandreformtheworkplace,sothatwecantakesomemeasuresforsafetytoavoidaccidents.Itiseasytouseanditisfeasibleforthesituationwhichislackofspecificevaluationmodelsordata.TheLECmethodiswidelyusedinvariousfields,suchasaircraftindustry,railwayindustry,metallurgicindustry,coal-miningindustryandsoon.TheusageofLECdoesnthavemanydifferences.Firstly,weshouldselecttheevaluationunit,thenidentifythemaindangerintheunit.Next,weneedtoevaluatethedangerbyusingthatchartandgetaconclusion.
