A project order is a directive to purchase products and/or perform work, such as for construction or facilities management. 

Approvals may be associated to indicate the status of acceptance or rejection using the IfcRelAssociatesApproval relationship where RelatingApproval refers to an IfcApproval and RelatedObjects contains the IfcProjectOrder. Approvals may be split into sub-approvals using IfcApprovalRelationship to track approval status separately for each party where RelatingApproval refers to the higher-level approval and RelatedApprovals contains one or more lower-level approvals. The hierarchy of approvals implies sequencing such that a higher-level approval is not executed until all of its lower-level approvals have been accepted. 

The Property Sets for Objects concept template applies to this entity as shown in the table below:

The figure below shows the project order composition. As shown on the figure, an IfcProjectOrder may be aggregated into components. 

The Object Nesting concept template applies to this entity as shown in table below:

The figure below illustrates IfcProjectOrder assignment relationships as indicated:

• IfcActor (IfcRelAssignsToActor): Organization issuing the order such as an owner or contractor.

The IfcProjectOrder may have assignments of its own using the IfcRelAssignsToControl relationship where RelatingControl refers to the IfcProjectOrder and RelatedObjects contains one or more objects of the following types:

• IfcActor: Organization(s) contracted to fulfill the order, typically a single contractor, subcontractor, or supplier.