The discussion that follows presumes that any file copying necessary to produce test
data was performed under adequate controls to preserve data integrity. Furthermore, the
tests described are applicable to both mainframe and PC environments. The focus of this
material is on explaining the logic underlying various substantive tests and on illustrating
the functionality of ACL in achieving audit objectives. The audit procedures described
are based on the file structure in Figure 10.7. These structures indicate the key data and
logical linkages between files. A description of each file follows.