Background and Overview of the COSMIC-ISO 19761 ◾ 61
© 2011 by Taylor & Francis Group, LLC
◾ Viewpoint: A form of abstraction, for example, end user viewpoint or
developer viewpoint.
◾ BFC: An elementary unit of FURs dened by and used by a FSM method
for measurement purposes. ey are recognized within the FURs and assign
values that are used to calculate the functional size.
◾ BFC type: A dened category of BFCs. ISO/IEC 14143-5:2004 (ISO 2004)
decomposes BFC types into four categories: transaction classes, data types
recognized, information creation function types, and data retention require-
ments. Information creation function types correspond to the processing
way of a transaction, and range in complexity from ...