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Copyright © 2014 by Cenbee Bullock PFS Consulting Ltd
PFS
Specialising
In Functional Safety
Minimising Systematic Failures in SIS Design
Type of Failures
Random
failures
Systematic
failures
Predictable
Quantifiable
Unpredictable
Unquantifiable
Perform
unintended
function
Material
degradation
Ageing
Fatigue
Environmental
influence
Human error
Software bugs,
Data comm.
error
Programmable
Electronic
system
Electro- Mechanical
system