The COSMIC Generic Software Model is based on fundamental software engineering principles, namely:

  • Functional user requirements of a piece of software can be analyzed into unique functional processes, which consist of sub-processes. A sub-process may be either a data movement or a data manipulation
  • Each functional process is triggered by an 'Entry' data movement from a functional user which informs the functional process that the user has identified an event that the software must respond to.
  • A data movement moves a single data group of attributes describing a single 'object of interest', where the latter is a 'thing' of interest to a functional user
  • There are four types of data movement sub-processes. An 'Entry' moves a data group into the software from a functional user and an 'Exit' moves a data group out. 'Writes' and 'Reads' move a data group to and from persistent storage, respectively.

As an approximation for measurement purposes, data manipulation sub-processes are not separately measured. The size of a piece of software is then defined as the total number of data movements (Entries, Exits, Reads and Writes) summed over all functional processes of the piece of software. Each data movement is counted as one 'COSMIC Function Point' ('CFP'). The size of a functional process, and hence the size of a piece of software, can be a minimum of 2 CFP, with no upper limit.

VisualFSM COSMIC Quick Start

Click on picture to watch the video

About Pentad-SE

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

Privacy Policy

Pentad-Se will use any information you give us only in connection with the VisualFSM product line. We will not share or distribute any information you give us with any other third party.

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..


Get in Touch