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Description of Function Point

The following part of the document contains material from the IFPUG © Counting Practices Manual. The criteria for determining the complexity, such as the aforementioned scores, are discussed in that publication (CPM 4.1). For each of the elements being counted, these criteria are used to establish complexity based on the following tables included below as a memory aid.

Summary of the function points (that is, the functional scores) to be attributed to the functions depending on their complexity:  

Determination of complexity:

 

EI	1-4 DET	5-15 DET	16 or more DET
0-1 FTR	low	low	average
2 FTR	low	average	high
3-4 or more FTR	average	high	high

 

EO/EQ	1-5 DET	6-19 DET	20 or more DET
0-1 FTR	low	low	average
2-3 FTR	low	average	high
4 or more FTR	average	high	high

 

ILF/EIF	1-19 DET	20-50 DET	51 or more DET
1 RET	low	low	average
2-5 RET	low	average	high
6 or more RET	average	high	high

where:
DET (Data element type): a user recognizable, nonrecursive field.
FTR (File type referenced): read/maintained ILF or a read (by EI/EQ/EO) ILF.
RET (Record element type): user recognizable subgroup within an ILF/EIF.

Further discussion may be found in some of the books indicated in the orientation section, and in particular in a book on quality that offers a more general picture of the qualitative and metric factors. For more information, visit the IFPUG site at www.ifpug.org.