utVOLter wrote:1. At least 1 hour of open pit for warm-ups before competition starts
2. Warm-ups can be ceased by the official at the end of the 1 hour period or if everyone (vaulters) agrees they are ready to compete or if no attempts are taken by any vaulter within a 15 minute period.
3. A vault field of over 25 vaulters should be split up into 2 flights or run on two seperate pits. More than this is simply too many people to allow for adequate warm-ups for everyone, and also promotes injury simply by the length of time a vaulter must wait between attempts in the meet.
One hour should be minimum for big competitions (20+ guys) but for smaller meets you can get away with less if the guys are ready to get on the runway as soon as the girls are done. Certainly if everyone is ready to go sooner they should start sooner.
Your third suggestion is just not always practical given the constraints of most meets. What big meets should do is either have a qualifying standard, or publish the opening height, so that no one enters who is not ready, and then go 20-30cm increments for the first few bars.
I am a huge fan of starting low and going in big increments for the bars.