When we aggressively started adopting DevOps culture, both Ops and Dev got a chance to involve in both the practices. So they can get an understanding of responsibility and the primary goal of each individual. At initial, we splited both the team and assigned 2 or 3 members (Dev+Ops pending upon the module) to take ownership and accountability for each and every release and log effort, time spent, total failure during development, total failure post-release, an incident occurs, no of RCA published etc. After collecting all this number goal was to reduce the previous failure and this small team was ready to take up this as the next challenge. Of course, we keep swapping members after 3-4 release and now anyone can take up anything. There were blockers but every organization / leader can handle in there own ways.