Human Performance (HP) refers to how people perform their work throughout the aviation system and how they can both enable risks and help manage risks. HP is informed by Human Factors, which applies knowledge of human abilities and limitations to job and equipment design. Key areas of HP work include safety data analysis, change management, fatigue management, safety of automated systems, risk management, and training. Foundational HP concepts encompass human performance principles, human-centred design, and systems thinking. The ICAO manual on HP supports regulators in taking approaches that help people in aviation do their jobs safely.

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https://www.icao.int/safety/OPS/OPS-Normal/Pages/HP.aspx
Human Performance
HP Home HP Principles Human-Centred Design Systems Thinking
Human Performance (HP) represents the human contribution to system
performance and refers to how people perform their work. Throughout
the aviation system, people are both the source of some of the risks and
an integral part of identifying and managing all risks.
How we support HP is informed by Human Factors (HF). HF is concerned
with the application of what we know about human beings, their abilities,
characteristics and limitations, to the design of equipment they use,
environments in which they function and jobs they perform.

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https://www.icao.int/safety/OPS/OPS-Normal/Pages/HP.aspx
HP-related areas of work
HP considerations are key to enabling safe operations, whether focused
on flight operations, air traffic control, maintenance, or remote operations
(including remotely piloted aircraft systems and remote towers). HP-
related areas of work are dispersed across a range of topics including:
Collection and analysis of safety data
Change management and introduction of new systems
Fatigue management
HP considerations in automated systems
Safety risk management
Personnel Training and Licensing
Key HP concepts
Key concepts that highlight the human contribution to the aviation
system and that provide a foundation for approaches and actions that
support HP include:
Human Performance Principles
Human-Centred Design
Systems Thinking
The Manual on HP for Regulators (Doc 10151)

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https://www.icao.int/safety/OPS/OPS-Normal/Pages/HP.aspx
This ICAO manual supports regulators to
make it easy for people in the
aviation system to "do the right thing" on
the day and avoid negative safety
consequences. It addresses HP
considerations in regulatory activities
such as the development of appropriate
regulatory material, through evaluating,
accepting and approving organizations,
systems, processes and people, and
through continued surveillance. It also illustrates how HP
considerations are embedded in key oversight responsibilities and
activities that are included in a State Safety Programme.