Project Estimation Techniques - Function Point Analysis

Function point analysis has been around since 1979. It uses 5 types of functions to categorize the software. The 5 functional types of function points are outputs, inquiries, inputs, internal files, and external interfaces.

There are many artcles and books on Function points. Here is a link to a primer bit.ly/43KWT4 by Alvin J. Alexander

To estimate the size of a software project you identify the type and complexity of each FP. Using a FP model an unadjusted score is derived. The UFP is then adjusted using the results of looking at 14 factors
Function points give you the size of the software effort which you can then put a cost to. You also need to add in costs for testing etc.

There are lots of resources for learning about function points. One place to start is the IFPUG, International Function Point User Group. One of the advantages of function point analysis is that fps give you a measurable value that can be used to provide other project metrics. Function points give you a measurable method to determine the size of a software effort. Function points also give you a measure of complexity for each function. This can be used to better plan testing and debugging costs