COSMIC size of a functional process is measured by counting its data movements. In other words, this approach assumes that each data movement accounts for any associated data manipulation. By definition, a data movement is a subprocess that moves a group of data attributes that all describe a single object of interest (think of an object-class, a relation in 3NF, or an entity-type). The unit of measurement is one data movement, designated as 1x COSMIC function point, or 1 CFP. A functional process has a minimum size of 2 CFPs. It must have an Entry plus either an Exit or a Write, as the
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