Normal Accidents LO12272

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> LonBadgett said:
>
> Two amplifications on human error
>
> 1. System reliability is the total of the multiplied reliability of
> each
> componant. Thus the system reliability of a machine with three parts
> a,b,
> and c, is (reliability a) x (reliability b) x (reliability c). Most
> people, however, will intuitively attempt to add the chances of
> failure of
> each componant or each step in a process to establish the overall
> odds of
> failure or accident potential. (reliability a) + (reliability b) +
> (reliability c).

Are you saying "A chain is as strong as its weakest link" AND most people
think the chain looks much stronger than it really is?

Regards

Peter

-- 
Peter H.Jones, Peopletronics Ltd, PO Box 30 451, Lower Hutt, New Zealand. 
Tel.64 4 569 8875, Fax 64 4 569 8881, phj@actrix.gen.nz
WebPage http://www.Peopletronics.co.nz
 

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