Some choose to lead and get things done by applying high amounts of pressure and self imposed deadlines.
It works. However, quality typically lacks and problems tend to appear later.
Instead, focus on working with the teams to build time boxes that ensure full discovery and requirements definition.
No one wants a somewhat functional solution. We all want a solid well functioning solution.
While high pressure stress inducing deadlines may get people moving, it just makes more messes to cleanup at a later point.
Take your time. Do it right.