lørdag den 6. december 2008

The Safety Plan


The Safety Plan is a key document and describes "Who does what and when". A Safety Plan of the size of an A4 paper could look like below for an Operator or Infrastructure owner who wants to buy a product from a Supplier.



Interpretation

The Safety Plan, above, describes, in a simple way, the most important headlines of "who does what and when".

The fourteen phases from the V-model has been simplified into three vertical phases.

The risk analyses and requirements specification phases are handled at the workshop(s), arranged by the Project manager in phase 1.

The needed independency is cleared and discussed by the Project Manager and the Safety Authority, when he or she must enter personal names and company names for the roles in each column.

The main safety activities are described in the table. As it can be seen, the supplier is responsible of designing, implementing, verifying and validating the product, mainly in phase 2.

The customer (the Operator or Infrastructure owner) must participate in phase 1, when the product is specified, and in phase 3, when the product must be approved and set into service.

The Safety Plan can be seen as an overview of the main safety management phases, roles and activities. More detailed information can be added if needed with references to Minutes of Meetings, appendices, sub chapters etc.

Next chapter >> 3.4 Hazard log and risk analysis

Focus on the source (EN 50126:1999)


EN50126; chapter 3.39 Safety plan: A documented set of time scheduled activities, resources and events serving to implement the organisational structure, responsibilities, procedures, activities, capabilities and resources that together ensure that an item will satisfy given safety requirements relevant to a given contract or project.

A recommendation to a complete Safety Plan, suited for a complex project, is given in chapter 6.2.3.4.

Requirement 4 of phase “System definition” shall be to establish the Safety Plan for the system. The Safety Plan shall be agreed by the Railway Authority and the railway support industry for the system under consideration and shall be implemented, reviewed and maintained throughout the lifecycle of the system. The Safety Plan should include:

a) the policy and strategy for achieving safety.
b) the scope of the plan.
c) a description of the system.
d) details of roles, responsibilities, competencies and relationships of bodies undertaking tasks within the lifecycle.
e) description of the system lifecycle and safety tasks to be undertaken within the lifecycle along with any dependencies.
f) the safety analysis, engineering and assessment processes to be applied during the lifecycle, including processes for:
- ensuring an appropriate degree of personnel independence in tasks, commensurate with the risk of the system;
- hazard identification and analysis;
- risk assessment and on-going risk management;
- risk tolerability criteria;
- the establishment and on-going review of the adequacy of the safety requirements;
- system design;
- verification and validation;
- safety assessment, to achieve compliance between system requirements and realisation;
- safety audit, to achieve compliance of the management process with the safety plan;
- safety assessment to achieve compliance between sub-system and system safety analysis.
g) details of all safety related deliverables from the lifecycle, including:
- documentation;
- hardware;
- software.
h) a process to prepare system Safety Cases.
i) a process for the safety approval of the system.
j) a process for safety approval of system modifications.
k) a process for analysing operation and maintenance performance to ensure realised safety is compliant with requirements.
l) a process for the maintenance of safety-related documentation, including a Hazard Log.
m) interfaces with other related programmes and plans.
n) constraints and assumptions made in the plan.
o) subcontractor management arrangements.
p) requirements for periodic safety audit, safety assessment and safety review, throughout the lifecycle and appropriate to the safety relevance of the system under consideration, including any personnel independence requirements.

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