People problems – the attendees could be late or absent, what results in a missing things such as registration or early parts of the event. The speakers could be late or absent, what affects the event’s plan and schedule, diminishes the event’s objectives. The failure by suppliers could effect in the delays of the equipment delivery, refreshments or materials what may lead the event to the complete failure.
Equipment problems – the various problems which could occur with the equipment and devices used during the event. It could be the audio visual system equipment