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Plant Operation

By this stage, commissioning is complete and the plant has been moved on to normal operation.

The operations team will be responsible for the operation and maintenance of the plant and teething problems are worked out.

During the operational phase, it is important to review the measures that were put in place at the design stage to ensure that they are working as intended. Many companies choose to carry out a hazard study 6 (HS6) in early operational lifecycle to ensure that the level of safety is appropriate and that the original design assumptions were valid.  See Hazard Study 6.

After HS6 (typically carried out within the first few months of operation), the focus moves towards confirming the continued safe operation of the process and the associated safety systems by way of a “Stage 4 Functional Safety Assessment” (FSA4) as per IEC 61511 and carrying out review (or “revalidation”) of the safety studies (HazOpHazard & Operability Study /LOPALayer of Protection Analysis ) after 5 years of operation. This review phase captures any changes made to the plant over the years of operation and reviews the safeguards that were put in place, to ensure they are being managed effectively. This 5-year timeframe gives sufficient operational experience to make the review worthwhile.

What =Method can do for you

  • Provide experienced study facilitators for 5-yearly hazard study reviews.
  • Carry out independent verification of hazard studies carried out by others (verification is a requirement of IEC 61511).
  • Carry out Stage 4 Functional Safety Assessments.

Process Safety Lifecycle


FSA0
FSA`
FSA2
FSA3
SIL Determination
FSA4
FSA5
FSA6
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Initial Conceptual Design & Feasability Study

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