Jim Caldwell has said that "innovation is key" for the Detroit Lions in 2014.
The former Baltimore Ravens offensive coordinator was appointed as the team's new head coach after Jim Schwartz was fired, with the side missing out on a place in the playoffs for the second year in a row.
The 59-year-old told 1130 AM: "I think that innovation is key. One of the things about this league, and particularly in the division, when you play teams multiple times that you have to have a bit of variety.
"You have to make certain you can keep them off balance. That's going to be key. But also you have a real firm grip on what the core principles are just in terms of offensive football and how you win games."
The Lions finished third in the NFC North in 2013 with a 7-9 record.
