System time and other platform data are commonly used in modern software systems. Examples of platform data include network data (e.g. IP address, MAC Address), system identification data (e.g. OS Type, OS Name and Version) and any other data maintained within the Operating System (OS) or Runtime Environment. Platform data is sometimes used as tracking information, such as logging transactions, but some other times this data is significant and essential to satisfy business requirements. It is then important to establish clear guidelines on how to count such data in Function Points. This paper makes use of several examples to illustrate the application of the CPM rules to identify and count platform data and the associated transactions.

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