public final class ProjectScheduler

Works out when every task of a project happens.

A forward pass gives each task the earliest dates its predecessors, its constraint and its leveling delay allow, in the project’s working time. A backward pass from the project’s finish gives the latest dates that delay nothing, and the difference is slack: a task with none is critical.

ProjectModel.update runs it. The whole project is scheduled every time; a pass is linear in tasks and links, and a partial one would have to prove what it may skip.