The biggest logistical challenges are recognisable. First: timing. Suppliers arrive late (catering can run 30 minutes over). Second: communication problems. Your left hand doesn't know what your right hand is doing. The technician thinks the setup is ready at 15:30, catering assumes 16:00. That doesn't add up. Third: unexpected guest numbers. You expected 80, but 95 turn up. Food and drink run out. Fourth: technical faults. The sound doesn't work and the wifi is slow. Or the projector gives up. These require quick solutions. Fifth: weather conditions. Outdoor event with rain; people get wet. Sixth: dealing with stakeholders. Your manager wants something different at the last minute; this disrupts the whole plan. Seventh: stress within the team. Everyone is tired on the day itself. People start working inefficiently. You prevent this through good preparation and fixed break moments. The best approach: a hyper-detailed logistics plan with plenty of communication beforehand. And on the day itself a calm, reassuring leader.