One of the major change introduced in BI Apps 18.104.22.168.1 is the way
how we manage the ETL task sequence and trim the unnecessary tasks.
This functionality was accomplished earlier using DAC.
The problem we frequently faced was that the DAC repository and the
INFA repository are maintained as two separate repositories. We have to
sync up the name of tasks exactly in order to use DAC to manage the
task execution of the Informatica workflow tasks.
Here is a good article that describes the story.