means of measuring software size and productivity. It uses
functional, logical entities such as inputs, outputs, and
inquiries that tend to relate more closely to the functions
performed by the software as compared to other measures,
such as lines of code.

Function Point (FP) is an accurate technique to measure the 
size of the software or a specific module or function, it 
is more accurate and scientific than the LOC (line of code) 
metric, we (as software testers) use the FP for our defects 
matrices such as defects density (number of defect per 
function.

Belal Raslan