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Function point analysis

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Function Point Analysis (FPA) is an ISO recognized method to measure the functional size of an information system. The functional size reflects the amount of functionality that is relevant to and recognized by the user in the business. It is independent of the technology used to implement the system.

The unit of measurement is "function points". So, FPA expresses the functional size of an information system in a number of function points (for example: the size of a system is 314 FPs).

The functional size may be used:

  • to budget application development or enhancement costs
  • to budget the annual maintenance costs of the application portfolio
  • to determine project productivity after completion of the project
  • to determine the Software Size for cost estimating

FPA can also be used to find the testing effort required in the information system

The formula is Number of Test Cases = (Function Points)1.2

See also

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