Presentation from Marco Dozza at parallel session on FOTs

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Presentation from Marco Dozza at parallel session on FOTs

  1. 1. euroFOT: constrains and trade-offs in testing hypotheses SP2 – In-vehicle Systems for Driving Support CHALMERS Marco Dozza Chalmers University of Technology TRA Brussels, 8th June 2010 www.eurofot-ip.eu Contents • This talk in the FESTA context • Hypotheses • Constraints for hypotheses testing Results • Conclusions www.eurofot-ip.eu
  2. 2. FESTA Function identification Socio-economic and description Impact Assessment System and Function Use cases Analysis Research Questions Research Question and and Hypotheses Hypothesis Analysis Performance Study Ethical Data Analysis indicators Design legal issues Data base Measures and Performance Sensors Measures indicators Data Acquisition www.eurofot-ip.eu A FESTA hypothesis: • is a statement testable with statistics • tests a cause-effect relation • requires: A system (cause) A performance indicator (effect) A direction of change (relation) • often requires a comparison between baseline and treatment data cause relation effect • Eg. ACC decreases mean speed www.eurofot-ip.eu
  3. 3. Data analysis: Percentage % www.eurofot-ip.eu Constraints for hypothesis testing • measurability of IVS operation • calculability of performance indicators • OEM-specific IVSs implementations • risk of benchmarking • combinations of IVSs • baseline definition • IVSs abuse and misuse • nature of data collected • access to proprietary information • computational time • measurability of confounding factors • statistical significance • reliability of maps and accident databases. www.eurofot-ip.eu
  4. 4. ACC decreases mean speed • ACC is one function, but implemented in 5 different systems. www.eurofot-ip.eu ACC decreases mean speed • ACC is not an “on-off” function. • ACC can be: • On with target • Off • On without target (CC) • Stand-by • Overridden www.eurofot-ip.eu
  5. 5. ACC decreases mean speed • ACC may not be the only system active. • Data can be filtered by ACC activation but longitudinal effects cannot be related to a single cause. • Is it really fair to evaluate functions individually? • Can the experimental protocol really solve this issue? www.eurofot-ip.eu ACC decreases mean speed • What is baseline? System off System not available A segment of data in which all variables are the same but the systems status www.eurofot-ip.eu
  6. 6. Constraints for hypothesis testing • measurability of IVS operation • calculability of performance indicators • OEM-specific IVSs implementations • risk of benchmarking • combinations of IVSs • baseline definition • IVSs abuse and misuse • nature of data collected • access to proprietary information • computational time • measurability of confounding factors • statistical significance • reliability of maps and accident databases. www.eurofot-ip.eu Thanks for attention! www.eurofot-ip.eu

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