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The tasks required for preparing an OHA 9  are described in Section 5.2.1 through Section 5.2.9. 

## 5.2.1 Identify Stakeholders 

Identify applicants, approval authorities, and stakeholders needed to establish and demonstrate compliance with requirements for the air traffic service provision, its use, and any related CNS/ATM system. The stakeholders should also be SRM panel members, as practicable. 

## 5.2.2 Identify Operational Air Traffic or Other Services 

Copy the services provided by the solution that were documented in the OSED into the OHA. 

## 5.2.3 Conduct Analysis to Identify the Operational Hazards 

Identify the operational hazards. Document the analyses undertaken, linking the proposed improvement and the operational safety of the NAS elements—specifically the detailed, logical, and analytical connections. For these types of analyses, the most effective method is to “fail” each of the identified functions and their outputs. This is best done by “failing” the functions from the developed N 2  diagram or the FFBD, if available. 

## 5.2.4 Develop the PHL 

Review the hazards identified and develop a PHL that is concise, clear, and understandable; this PHL serves as the repository of the initial efforts of the SRM panel to identify all possible hazards. The PHL is refined and matured over time as the SRM panel validates the identified 

