Nesma recognizes three types of function point analyses:
– detailed function point analysis, as described in the standard
– high level function point analysis
– indicative function point analysis
All these three methods are a self-contained Functional Sizing Measurement (FSM) method on their own. The high level FPA method and the indicative FPA method do not require detailed user requirements, while the functional size determined using these methods is very close to the functional size determined using the detailed FPA method. That’s why these two methods are very suited to be applied early in de software development life cycle or in case the functional size needs to be determined fast.
This document discusses these three methods, their accuracy and applicability.
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