A hybrid project has repeatedly missed handoffs between its infrastructure and application teams. Each team blames the other, and both have met their internal targets. What should the project manager do first?

1. Escalate every handoff directly to the sponsor before involving the teams
2. Facilitate a joint review of handoff expectations and agree on shared working agreements
3. Add separate status reports without changing the handoff process
4. Replace the application team lead based on the number of complaints