Measurement and Theoretical Basics of the COSMIC-ISO 19761 ◾ 97
© 2011 by Taylor & Francis Group, LLC
entry and control activities. Output, on the other hand, is sent to the user by
exit and conrm activities. Dotted arrows depict access to stored data with read
and write activities. e data ow internal to the transaction is depicted with
dashed arrows.
As mentioned before, the concept of logical activities is very similar to the
notion of subprocesses in the FFP approach, and entry, exit, read, and write
subprocess classes are used in that FSM method. e generalized representation
introduces three additional classes, mainly required for the representation of
IFPUG FPA.
IFPUG FPA and FFP 1.0 distinguish between data a