Functional Safety Management; The Safety Management System; The Safety Life-Cycle - Allen-Bradley AADvance T9110 Safety Manual

The Safety Management
System

The Safety Life-cycle

Functional Safety Management

This chapter explains the principles that should be applied to managing the
safety related system.
A prerequisite for the achievement of functional safety is the creation and use
of procedures and other measures as part of a safety lifecycle, collectively
known as a Safety Management System. The Safety Management System
defines the generic management and technical activities necessary to achieve
and maintain functional safety in the product design and development. In
many cases, the Safety Management and Quality systems will be integrated
within a single set of procedures. The integrator should have an accredited
quality management system.
The Safety Management System shall include:
• A statement of the policy and strategy for achieving and maintaining
functional safety.
• A safety planning procedure, which shall result in the definition of the
safety lifecycle stages to be applied, the measures and techniques to be
applied at each stage, and the responsibilities for completing these
activities.
• Definitions of the records to be produced and the methods of managing
these records, including change control. The change control procedures
shall include records of modification requests, the impact analysis of
proposed modifications and the approval of modifications. The baseline
for change control shall be defined clearly.
• Configuration items shall be uniquely identified and include version
information. Examples of configuration items are system and safety
requirements, system design documentation and drawings, application
software source code, test plans, test procedures and test results.
• Methods of ensuring that persons are competent to undertake their
activities and fulfill their responsibilities.
The safety life-cycle is defined by the IEC 61508 standard. It is designed to
structure a system's development into defined stages and activities as follows:
• Scope definition
• Hazard and risk analysis
• Functional and safety requirements specification
Rockwell Automation Publication ICSTT-RM446N-EN-P - April 2018
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