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Rockwell Automation Publication ICSTT-RM446N-EN-P - April 2018
Chapter 2
Functional Safety Management
• System engineering
• Application programming
• System production
• System integration
• System installation and commissioning
• Safety system validation
• Operation and maintenance plan
• System modification
• Decommissioning
The definition of each life-cycle stage shall include its inputs, outputs and
verification activities. It is not necessary to have separate stages within the life-
cycle addressing each of these elements independently; but it is important that
all of these stages are covered within the life-cycle. Specific items that need to
be considered for each of these life-cycle elements are described in the
following sub-paragraphs.
Scope Definition
The scope definition is the first step in the system life-cycle. You have to
identify the boundaries of the safety related system and provide a clear
definition of its interfaces with the process and with all third party equipment.
This stage should also establish the derived requirements resulting from the
intended installation environment, such as environmental conditions and
power sources.
In most cases, the client will provide this information. The system integrator
must review this information and gain a thorough understanding of the
intended application, the bounds of the system to be provided, and its intended
operating conditions.
Hazard and Risk Analysis
The hazard and risk analysis has three objectives:
• The first objective is to determine the hazards and hazardous events of
the controlled system for all reasonably foreseeable circumstances,
including fault conditions and misuse.
• The second objective is to determine the event sequences that may lead
to a hazardous event.
• The third objective is to determine the risks associated with the
hazardous event.
This risk analysis will provide basic information for identifying the safety-
related requirements to mitigate risks.
