The SiFPA Method

The SiFPA method was developed by DPO in 2010, used since the late part of that year and presented at SMEF2011.

SiFPA is not an estimation method (like Early & Quick FP) but a real FSMM compliant with ISO 14143 principles. It is totally compliant with the IFPUG method at the results level: if applied to the same software application portfolio they both give the same numbers.

VisualFSM - SiFPA

VisualFSM implements SiFPA in 2 simple models

  • The Transaction Function Model which comprises the set of Univeral Generic Elementary Processs (UGEP)
  • The Data Function Model which comprises the set of Universal Generic Data Groups (UGDG)

VisuaFSM contructs the models automatically from the commonFunction and Data Models.

The only activity required of the user is to assign the UGDGs referenced or maintained by each of the UGEPs that are in the scope of the measurement. VisualFSM calculates the size of both models that are in the scope of measurement. A report can be printed or exportes to Excel..

Main advantages claimed by SiFPA

    • ISBSG productivity data immediately available
    • 2 to 5 times faster in measurement
    • Easy to learn
    • Lowers Customer-Supplier disputes
    • Available for non-specialists in measurement
    • Same unitary costs as the IFPUG FPs may be used in contracts
    • Immediate conversion of assets already measured using IFPUG


    Click here to go to the SiFPA Website

VisualFSM SiFP Demo

Click on picture to watch the video

Click here to download the SiFPA Quickstart Guide

About Pentad-SE

The Business of Pentad-SE is to provide the support, training and appropriate tools needed to implement software measurement strategies.

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Free Community Edition

The Community Edition
is designed to help prospective analysts and measurers to acquire Functional Size Measurement skills and share experiences with other users.It is not intended for commercial use.

The Personal Edition
Is for personal and commercial use and additional features are unlocked .

The Professional Edition
For handling multi projects and estimating.

The Solution Farm

As a service to the Measurement Community Pentad-SE has established the Vfsm Solution Farm. There you will find solutions to Case Studies from all four methods.

If you are connected to the Internet Vfsm can retrieve the current catalogue of solutions and you will be able to download them directly. You may have to pay a small fee for some of the more complicated solutions..


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