In the State of Maryland, part of the construction project must contain a percentage of "add alternates" to a project. In this case, which is a schools 2009 project, the "add alternate" is an addition. With this add alternate, we will not know the exact FTE, or concrete building square footage, until the project bids are accepted. With the possible added square footage, should we use the highest square footage and calculate all items, such as FTE, from the start? Thanks for any advice.