## Term for normalized percent error?

## Term for normalized percent error?

(OP)

Is there a term for percent error type calculations when using the full scale value as the denominator instead of the actual value? Using percent error results in very high values when the actual quantities are small.

For example on a line rated at 500 MW with an error of 10 MW, what would I call the calculation that results in 2% for both of these cases:

For example on a line rated at 500 MW with an error of 10 MW, what would I call the calculation that results in 2% for both of these cases:

assuming a calculated flow of 10 MW and an actual flow of 20 MW

% error = 50% =abs(10 MW-20 MW)/20 MW

% ????? = 2% =abs(10 MW-20 MW)/500 MW

assuming a calculated flow of 490 MW and an actual flow of 500 MW

% error = 2% =abs(10 MW-20 MW)/20 MW

% ????? = 2% =abs(490 MW-500 MW)/500 MW

## RE: Term for normalized percent error?

## RE: Term for normalized percent error?

## RE: Term for normalized percent error?

I would call it (politely) an incorrect calculation

## RE: Term for normalized percent error?

The speeding ticket 80 km/h in a posted 40 km/h Zone.

Ferraro Enzo ZXX owner "Top speed of my car is 395 km/h. (80-40)/395 is barely more than 10% over the limit."

Tata Nano owner "Top speed of my car is 110 km/h. (80-40)/110 36% over the limit! Man I was really flying!"

Who pays the higher fine?

Bonus question: Who pays the higher fine as a percentage of their income?

## RE: Term for normalized percent error?

John R. Baker, P.E.(ret)EX-Product 'Evangelist'

Irvine, CA

Siemens PLM:

UG/NX Museum:

The secret of life is not finding someone to live withIt's finding someone you can't live without

## RE: Term for normalized percent error?

Mint,

Does my edited post make more sense? I agree that a calculation that always had the same result would be wrong.

Your bonus question is quite on the point. It uses the percent Full Scale of the owners income rather than using percent error.

## RE: Term for normalized percent error?