http://newenergytimes.com/v2/conferences/2011/ICCF16/pres/ET01Grabowski-RobustPerformanceValidation.pdf
Their methodology is pretty much what I've been insisting (except that I didn't require a dummy electric-heater unit) on : in particular:
If possible, ascertain contents of Black Box before and after test to limit quantity of stored energy available
- Knowledge of mass and volume of Black Box
- High power output device (i.e., > kW), compared to inputs
- Long time measurements (days?) if at lower power
- Limited mass and volume available for fuel
- High power output device (i.e., > kW), compared to inputs
- and