Flexibility, in my opinion is critical to a successful outcome. Preplanning while important must not pigeonhole one into tunnel vision, situational awareness is an essential facet in an ongoing dynamic event. Preplans will enable one to initiate action with thoughtfulness, but must allow flexibility in reacting to changing situations and events. The best plans are ones that allow for rapid assessment, followed by action(s) that is(are) constantly being evaluated and altered to meet any changes to the situation.

Pete