What is Functional Safety?
A safety system is functionally safe if; Random, Common Cause or Systematic failures do not lead to manlfunctioning of the safety system resulting in;
- Injury or Death of people
- Spills to the environment
- Loss of equipment or production
In order to achive a functionally safe system, we adopt IEC61511 following techniques;
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- Safety Integrity Levels (SIL’s)
- Safety Life Cycle
- Safety Management Plan
- Hazard and Operability Study (Hazop) & Layer of Protect Analysis (LOPA)
- Safety Requirement Specification (SRS)
- Design and verification
- Functional Safety Assessments (FSA’s)
What are the primary lifecycle causes of control and safet system failures?
- Specification 44%
- Changes after commissionoing 20%
- Operation & maintenance 15%
- Design & implementation 15%
- Installation & commissioning 6%
