But don't take our word for it. It's too important to get it wrong. Some of the most interesting stories pilots can tell is how a missbid changed their lives. Check out the Union's Vacancy Bidding Pamphlet.
"The Bid Percentage represents your desired seniority position in a category. It is applied at the time of the award.
The final number of pilots within this range considers vacancies, pilots bidding out and possible secondary assignments occurring in the final award. The Bid Percentage is applied to awarded final number of pilots staffed to this category.
For example, let’s assume LAX737CA’s has a staffing MIN of 96 and a MAX of 102. The final award has 100 active pilots. An award of a 50% bid would mean your seniority is in the top 50 pilots of the category. This % is a point in time, at the time of the award. Changes in staffing at a category can occur due to new vacancies, displacements, and other types of assignments."
https://crewroom.alpa.org/ual/Deskto...cumentID=49515