My father was a building official for a city in Southern Florida.  He had done hundreds of plan checks.  I once asked him the percentage of plans that get approved the first time without corrections, and he said that about one out of every seven or eight first-time plan checks are successfully approved.

He said that many of the same corrections occur over and over again…and if the builders would simply spend an hour reviewing their plans before submittal…the could save the cost of a two to four-week added delay between the time the plans are submitted and the time they are actually approved.