An IfcWorkPlan represents work plans in a construction or a facilities management project.

A work plan contains a set of work schedules for different purposes (including construction and facilities management). Contained work schedules are defined through the IfcRelAggregates relationship. Through inheritance from IfcWorkControl it is also possible to define references to activities (for example, IfcTask) and resources used in the work plan. 

A work plan has information such as start date, finish date, total free float, and so on. IfcWorkPlan can also refer to the construction project represented by the single IfcProject instance (please also check the definition of IfcWorkControl). 

Figure below shows the backbone structure of a work plan that defines contained work schedules through IfcRelAggregates and, if not assigned otherwise to contained work schedules, assigned tasks and resources through IfcRelAssignsToControl. If an assigned IfcTask is a root-level task, such task must be declared on the IfcProject using the IfcRelDeclares relationship.