Introduction to Safety Instrumented Systems (SIS)
and Critical Controls in the Process Industry
Presented at the ISALA October Meeting


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Other articles and papers by Robin McCrea-Steele:

Who do you trust?

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This paper review the conditions and guidelines outlined in the standards. Issues addressing safe failure fraction, minimum hardware fault tolerance, operating environmental restrictions, etc, are analyzed for safety, practicality and lifecycle costs. The conclusions provide the plant operator with the elements conductive to making an intelligent decision when faced with the options of using third party certified subsystems or proven in-use non-certified equipment in a SIS



Integrating Control and Safety:
Where to draw the line

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Written by Robin McCrea-Steele, Invensys-Premier Consulting Services
Presented by Hydrocarbon Engineering
Volume 11 Number 9 - September 2006




Partial Stroke Testing
The Good, the Bad and the Ugly

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This paper reviews the pros and cons of PST in the processing industries, from an independent and objective viewpoint, with absolutely no vested interest from either vendors or end-users.