In counting FPs there are five standard
"functions"
that you
count.
The first two of these are called Data Functions, and last three
are
called Transaction Functions. The names of these functions are
listed
below.
-
Data Functions:
- Internal logical files
- External interface files
-
Transactional Functions:
- External Inputs
- External Outputs
- External Inquiries
Using this terminology, when a person that counts FPs looks at a software system, they see something like this:
These five functions will be discussed in greater depth in the sections that follow.