8-9 / 323
SIS Lifecycle
Risk
Assessment
Design and
Develop
Validation of
Requirements
Test and
Maintain
Monitor
Results
Review and
Verification
Modify
Record
Results
Identify
Hazards
Install &
Commission
SIS
Requirements
Spec
Funct’l Safety
Assessment
Funct’l safety
Assessment
Funct’l Safety
Assessment
Funct’l Safety
Assessment
Funct’l Safety
Assessment
Cinderella
Phases