In project management, float (or slack) is the amount of time an activity can be delayed without affecting the project's overall completion date. Activities on the critical path have zero float—any delay directly delays the project. Activities not on the critical path have float equal to the difference between the time available and the time required. Understanding float helps project managers prioritize: activities with little or no float need close attention, while those with significant float offer scheduling flexibility. Float can be used to level resource demands, accommodate delays in material delivery, or address unexpected problems without affecting deadlines. For municipal construction projects, tracking float helps managers make informed decisions about schedule priorities and resource allocation. Consuming float early in a project reduces later flexibility, so experienced managers preserve float when possible.