Safety Assessment

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Safety Assessment
The European Organisation for the Safety of Air
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Safety Assessment is an EC1035/2011
requirement EC1034-2011 helps understanding
which changes require a formal assessment that
needs NSA review Experience has shown that the
Safety Consideration Process provides good
understanding of the changes
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The Only acceptable means of compliance to ESARR4
(EC1035/2011) as of today is SAM (with
limitations)
SAM is a toolbox mainly known for its
FHA-PSSA-SSA processes - Functional Hazard
Assessment - Preliminary System Safety
Assessment - System Safety Assessment
SAM most suitable for hardware changes for which
we can have an influence on the design, usage
much more difficult for many other changes,
procedures, airspace etc
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eSAM

• eSAM V2.1 helps navigating through the
  documentation set of "ANS Safety Assessment
  Methodology"
• http//www.eurocontrol.int/safety/public/site_pref
  erences/display_library_list_public.html17

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Safety considerations
Brainstorming
First attempt to construct Safety Argument (high
level)
Initial safety argument
Translation of initial argument into required
activities
Safety Plan
Conduct of activities
Production of the report
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Safety considerations process
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Safety considerations
What are the needs for change? What are the new
system boundaries? (OPS Concept) Are there
(initial) assumptions? (OPS Concept) Are
(Initial) Safety requirements realistic? Will it
be possible to build an argument? What evidence
could be provided? Would it feasible and
beneficial to quantify? How shall the new
system/change be operated? What are the
interfaces? What impact foreseeable? How and
who will assess hazards? In what way is the
proposed operational concept different from
current one?
No operational concept Scope unclear Missing
assumptions Safety requirements unrealistic Bad
arguments Little or no evidence Errors in
calculations No concept of operations Impact at
boundaries not addressed Hazards classification
questionable SAFETY BENEFITS OF NORMAL
OPERATIONS?
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How did we do things so far?
What we used to do
We have trained the staff
We have a fall-back system
We have temporary procedures
We have Revised procedures
What we concluded
Decision to go operational
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What are we asked to do today?
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Initial safety argument
Arg0
We need to demonstrate that change will be safe
How are we going to do that?
Arg4
Arg1
Arg2
On-going operations will be safe
Arg3
Safe after implementation
Safe to migrate operations
Safe by design
How are we going to do that?
How are we going to do that?
How are we going to do that?
Life cycle
How are we going to do that?
Safety Plan
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Safety Assessment for DQR

• DQR-REQ-300 The safety assessment process to
  support the establishment of new or updated data
  quality requirements shall be documented and
  include all the necessary steps to derive the
  data quality requirements to ensure data of
  sufficient quality are provided to meet the
  intended use for each data item under
  consideration, as a minimum

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Safety Assessment for DQR

• Identify all relevant uses for the aeronautical
  data item or dataset.
• Conduct Hazard Identification and Analysis.
• Determine accuracy and resolution requirements
  taking into consideration
• The functionality, performance and availability
  required by the intended use to achieve an
  acceptable level of safety.
• The inherent limitations in originating the data
  item or dataset.
• Determine the data integrity level, based on the
  results of step 1 and step 2, for the most
  stringent use.
• Consider the necessity to assign requirements
  for the ability to determine the origin of the
  data, other than the ones already defined in
  Annex I Part C of Commission Regulation (EU)
  73/2010.
• Consider the necessity to assign requirements
  for the level of assurance that the data is made
  available to the next intended user prior to its
  effective start date/time and not deleted before
  its effective end date/time, other than the ones
  already defined in Article 7(3) and Article 7(4)
  of Commission Regulation (EU) 73/2010.

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Initial safety argument
Lets have a look at the MS-Visio figures
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QA
The European Organisation for the Safety of Air
Navigation