See below.

J L Mazerat Wrote:
-------------------------------------------------------
> Saying you are absolutely right, when talking
> about the mathematical formular used in the hand
> method to determine the transfer of heat from the
> source of the heat to the target body an
> individual involved with the development of the
> CFIcalcualtor stated in a deposition that the
> mathematical formular had a 20 -30% error rate.
> Are these the equations used in the calculator and
> other models? The error rate he was talking about
> was strictly the formular and not the different
> data imputed. He did not use the term
> uncertainty. Was this person wrong?

Your asking other folks to do the "homework" that you should be doing to answer your own questions. This data is readily available and you should have the ability to review the verification and validation of the specific models you are interested. He is correct to use the error rate. You were stating that the uncertainly in the plots in 921 was the error rate when it was the measurement of the uncertainty. 20% to 30% error rate is within the range of error rates calculated by the V&V study.

>
> I all am interested in is the fact this new
> version of the CFIcalculator is coming out. The
> calculation using this instrument will start
> showing up in court. Call it what you want, but I
> want to know how accurate the results are with all
> the impute data being correct. The second question
> was this calculator subjected to testing and peer
> review. By testing I am talking about blind
> testing to were the person without any knowledge
> of the conditions that took place during the fire
> investigates the scene, puts the data into the
> calculator and comes out with results. These
> results are the compared to the actual data
> collected during the fire.

Then obtain the documentation for the software and for the V&V studies. This will provide the necessary data and analysis to answer your questions.

The V&V studies were "peer-review." Most of the individual correlations that are built into the software suite have been published in peer-reviewed journals. They are also published in the SFPE Handbook of Fire Protection Engineering. These are well-established correlations.

Douglas J. Carpenter, MScFPE, CFEI, PE, FSFPE
Vice President & Principal Engineer
Combustion Science & Engineering, Inc.
8940 Old Annapolis Road, Suite L
Columbia, MD 21045
(410) 884-3266
(410) 884-3267 (fax)
www.csefire.com