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Invited Talk
The Law of Stretched Systems in Action: Exploiting Robots
David D. Woods
Ohio State University
Columbus, OH USA
woods.2@osu.edu
Abstract
Robotic systems represent new capabilities that justifiably excite
technologists and problem holders in many areas. But what
affordances do the new capabilities represent and how will
problem holders and practitioners exploit these capabilities as they
struggle to meet performance demands and resource pressures?
Discussions of the impact of new robotic technology typically
mistake new capabilities for affordances in use. The dominate
note is that robots as autonomous agents will revolutionize human
activity. This is a fundamental oversimplification (see Feltovich
et al., 2001) as past research has shown that advances in autonomy
(an intrinsic capability) have turned out to demand advances in
support for coordinated activity (extrinsic affordances).
The Law of Stretched Systems captures the co-adaptive dynamic
that human leaders under pressure for higher and more efficient
levels of performance will exploit new capabilities to demand
more complex forms of work (Woods and Dekker, 2000; Woods
and Hollnagel, 2006). This law provides a guide to use past
findings on the reverberations of technology change to project
how effective leaders and operators will exploit the capabilities of
future robotic systems. When one applies the Law of Stretched
Systems to new robotic capabilities for demanding work settings,
one begins to see new stories about how problem holders work
with and through robotic systems to accomplish goals. These are
not stories about machine autonomy and the substitution myth.
Rather, the new capabilities trigger the exploration of new story
lines about future operations that concern:
• how to coordinate activities over wider ranges,
• how to expand our perception and action over larger spans
through remote devices, and
• how to project our intent into distant situations to achieve our
goals.
Research on these story lines provide new results on awareness of
remote environments through robotic systems and
brittleness/resilience in coordinating people and robots that define
promising directions with high potential return for supporting
work though robotic systems (Woods et al., 2004). These results
also help us identify new candidates for challenge cases in HRI
and new classes of metrics (e.g., the fractal path scores developed
by Phillips and Voshel).
General Terms:
Human Factors, Design, Measurement,
Reliability
Bio
Professor in the Institute for Ergonomics at the Ohio State
University. Dr. Woods has been President of the Human Factors
and Ergonomic Society. He is a Fellow of that society as well as
the American Psychological Society and the American
Psychological Association. He has shared the Ely Award for best
paper in the journal Human Factors (1994), a Laurels Award from
Aviation Week and Space Technology (1995) for research on the
human factors of highly automated cockpits, the Jack Kraft
Innovators Award from the Human Factors and Ergonomics
Society (2002), an IBM Faculty Award (2005). Dr. Woods has
served on National Academy of Science and other advisory
committees including recently Engineering the Delivery of Health
Care (2005), and Dependable Software (2006). He has testified to
U.S. Congress on Safety at NASA and on Election Reform. He
was one of the founding board members of the National Patient
Safety Foundation, Associate Director of the Midwest Center for
Inquiry on Patient Safety of the Veterans Health Administration,
and was an advisor to the Columbia Accident Investigation Board.
Multimedia overviews of his research developing the foundations
and practice of Cognitive Systems Engineering are available at
url: http://csel.eng.ohio-state.edu/woods/ and he is co-author of
the monographs Behind Human Error (1994), A Tale of Two
Stories: Contrasting Views of Patient Safety (1998), Joint
Cognitive Systems (2005; 2006), and Resilience Engineering
(2006).
References
Feltovich, P.J., Hoffman, R.R., Woods, D.D., & Roesler, A.
(2004). Keeping it too simple: How the reductive tendency affects
cognitive engineering. IEEE Intelligent Systems, 19(3), 90-94.
Voshell, M. G., Woods, D. D. & Phillips, F. (2005). Human-
Robot Interaction: From Fieldwork to Simulation to Design.
Proceedings of the Human Factors and Ergonomics Society 49th
Annual Meeting. 26-28 September, Orlando FL.
Woods, D.D. & Dekker, S.W.A. (2000). Anticipating the effects
of technological change: A new era of dynamics for Human
Factors. Theoretical Issues in Ergonomic Science, 1(3), 272—282.
Woods, D.D. & Hollnagel, E. (2006). Joint Cognitive Systems:
Patterns in Cognitive Systems Engineering. Taylor & Francis.
Woods, D. D., Tittle, J., Feil, M. & Roesler, A. (2004).
Envisioning Human-Robot Coordination for Future Operations.
IEEE SMC Part C, 34(2), 210-218.
Copyright is held by the author/owner(s).
HRI’06, March 2–3, 2006, Salt Lake City, Utah, USA.
ACM 1-59593-294-1/06/0003.