Adelaide ordered a review of its football operations after a dramatic decline in fortunes since winning the 2017 minor premiership and subsequently losing the Grand Final to Richmond.
Crows chairman Rob Chapman said consistent themes emerged from the six-week review, led by external consultants, which was run in conjunction with a "detailed internal analysis".
"People talk about the club and the human side is often forgotten, and I would like to acknowledge the efforts of both Scott and Brett, who are quality people with a great deal to offer the AFL if they choose to continue in the industry," Chapman said.
"Current circumstances require us to make change to create the clear air required to give the new senior coach the best chance of success, and we owe it to our members and supporters to ensure the club is strong and successful."