It can be a real bear. Testers need to have their feet held to the fire. I don't know exactly how many there were on the PE testing team, but I'm guessing close to two dozen on paper. Testers need to be held accountable for doing X number of reported tests, participate in X many discussions, and doing X number of activities and reporting on them. They should keep up or leave the team.
Testing needs to be tightly assigned and coordinated.
Wow, I never realized what a job this could be. Producer Teut Weidemann himself worked with all of us on a daily basis, in addition to his other duties at Wings Simulations. He had to keep us on task, on target, and coordinated. This way, each mission from both sides would be repeatedly played by numerous testers. It's amazing how two people's perceptions of the same thing can often be very different.