Comments on Evo-Factor proposal draft BMW, 27.05.2015 Christoph Lueginger Comments on Evo-Factor proposal difficulties, requirements and dependencies

Comments on evolution factor proposal Break-In of a vehicle draft Comments on evolution factor proposal Break-In of a vehicle  Effect is large within the first few kilometers and reduces over time.  Only the complete delta between "0 km" and the run-in vehicle is a valid delta.  It can only be measured at a lab, and such, that the "0 km" measurement is matching the COP-process (dyno setting, pre, test). Any more kilometers will be unrepresentative. Run-in situation is obviously less critical. Comments On Evolution Factor Proposal, BMW, Lueginger, 27.05.2015

Comments on evolution factor proposal draft Comments on evolution factor proposal Sales and Registrations within a year  Sales / registrations are not equally distributed within a year and not equal between different years.  This disturbs an analysis which just takes an average. Comments On Evolution Factor Proposal, BMW, Lueginger, 27.05.2015

Comments on evolution factor proposal draft Comments on evolution factor proposal Process of a scientific statistical analysis pre- selection find distribution of age, sex, company car share  select subjects accordingly pre-study considers driving style and vehicle usage  make groups and ensure statistical requirements for each group study measurement via calibrated loggers over a sufficient period (considers real distance and real consumption and covers all seasons) analysis find and delete outliers and invalid data weight result of the groups according to their distribution Dipl.-Ing. Christian Reiser, et.al.: Kundenfahrverhalten im Fokus der Fahrzeugentwicklung, ATZ 07-08 2008 Jahrgang 110 Without obeying the rules for a statistical analysis which are there for many good reasons, any conclusion drawn from a result deviating from that will be invalid or will be valid only by chance. Allow for a certain period of familiarization. Drivers will try out functions at the beginning and are not used to the vehicle. An analysis with real driving can only start, after the driver is familiar with the vehicle, and therefore cannot cover brand-new vehicles. Measurement should not start from beginning, if vehicle is provided for the study. Comments On Evolution Factor Proposal, BMW, Lueginger, 27.05.2015

using average in real world draft Comments on evolution factor proposal Conclusion lab-testing using average in real world considers total break-in delta   no influence of driver group no influence of environmental conditions or seasons no influence of familiarization effects An evolution factor can only be derived from measurements in a lab ("0 km" demand). A realistic evolution factor, that covers the majority of the vehicles, is needed in order to avoid unnecessary test burden. Decision should be taken on the basis of a technically correct assessment in combination with available experience and data and shall be balanced with the resulting effort. Comments On Evolution Factor Proposal, BMW, Lueginger, 27.05.2015