IFC - Industry Foundation Classes/IFC concepts/IFC cost concepts

The primary classes related to this concept are:

• IfcCostSchedule
• IfcCostItem

A cost schedule can exist

A cost schedule is a collection of cost items, used for a specified purpose. Typical purposes are cost plans and tenders.

Note: there is no explicit documentation which explains how a cost schedule is related back to the project or context. Therefore, in the absence of documentation, we are assuming that we declare it to the project as shown. However, this is only an assumption. There are explicit arguments against this assumption, such as that a cost schedule must be tied back to a project order. However, this evidence is not considered strong enough as it is never mentioned in the cost schedule documentation page itself.

Source: IfcProjectOrder

A cost schedule can be part of a project order

Project orders, such as work orders, change orders, or in particular purchase orders, may include a cost schedule. For example, a cost schedule may be used to provide an estimate of costs for a work order.

Source: IfcCostSchedule, IfcProjectOrder