The phrase "redundant functions" refers to tasks or actions that are not necessary or are duplicated. It means there are extra or unnecessary processes that can be eliminated or streamlined to improve efficiency. Full definition
A series of knobs and buttons below provides redundant function for basic audio and HVAC controls. (fourwheeler.com)
$ 1 billion will come from the sales, service, and marketing side as they consolidate the retail footprint in certain markets, they combine marketing, weed out other redundant functions. (fool.com)
For many years, it was thought that the breadth of ceramide synthases present in cells represented redundant functions for this family of enzymes. (sciencedaily.com)