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发表于 2010-10-21 17:53:26
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传个Example给lz参考
这个是Crystalball这个软件中案例
ReliabilityofaHelicalSpring
Author
CrystalBall
Summary
Inthisexample,adesignengineerhasthetaskofchoosingthebestofthreematerialstouseforahelicalspring.TheengineermustuseCrystalBall®toaccountfortheknownvariationsinthestressparametersandsteelstrengths.Thismodelishelpfulforunderstandingthesensitivityanalysisfeature,theTornadoCharttool,theoverlaychart,andtheeffectsofdifferenttypesofdistributions.
Keywords:assumption,forecast,sensitivitychart,TornadoCharttool,engineering,reliability
Discussion
Thebestmaterialistheonethatwillgivethespringthehighestlikelihoodofwithstandingitspeakrequirements.Thelikelihoodofsuccess,knownasthespring’sreliability,canbeexpressedastheprobabilitythatthespring’sstrength(S)willexceedthestress(s)subjectedtoit:
Reliability=p(S>s) |
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