  The integration of human factors (HF) knowledge is crucial when developing
safety-critical systems, such as automated vehicles (AVs). Ensuring that HF
knowledge is considered continuously throughout the AV development process is
essential for several reasons, including efficacy, safety, and acceptance of
these advanced systems. However, it is challenging to include HF as
requirements in agile development. Recently, Requirements Strategies have been
suggested to address requirements engineering challenges in agile development.
By applying the concept of Requirements Strategies as a lens to the
investigation of HF requirements in agile development of AVs, this paper
arrives at three areas for investigation: a) ownership and responsibility for
HF requirements, b) structure of HF requirements and information models, and c)
definition of work and feature flows related to HF requirements. Based on 13
semi-structured interviews with professionals from the global automotive
industry, we provide qualitative insights in these three areas. The diverse
perspectives and experiences shared by the interviewees provide insightful
views and helped to reason about the potential solution spaces in each area for
integrating HF within the industry, highlighting the real-world practices and
strategies used.
