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Copyright © 2014 by Cenbee Bullock PFS Consulting Ltd
PFS
Specialising
In Functional Safety
Minimising Systematic Failures in SIS Design
Safety Integrity
IEC61508
Reference from UK HSE Survey
More than 80% of
accidents are
attributable in some
degree to human
failures !
Studies Show
“In determining safety integrity, all causes of failure (both
random hardware failures and systematic failures) that lead to an
unsafe state should be included.”