Choose a situation everyone knows
Start with a recurring meeting, a handover between functions, or a decision made under time pressure. Ask people what helps them work in that situation and where delays keep coming up.
Look at how working styles fit together
Some team members want to test an idea quickly. Others want to understand the criteria and constraints first. Both approaches can help at different points. Ask where the team benefits from speed and when it needs time to check risks.
Try a working agreement
At the end of each discussion, record what was decided, who owns the next step, and what would cause the team to revisit the question. Set a date to review whether several decisions were handed over more clearly.