IFC 4.3.1.0 (IFC4X3_ADD1) development

# 5.1.3.9 IfcProcess

ABSTRACT This definition may not be instantiated

## 5.1.3.9.1 Semantic definition

IfcProcess is defined as one individual activity or event, that is ordered in time, that has sequence relationships with other processes, which transforms input in output, and may connect to other other processes through input output relationships. An IfcProcess can be an activity (or task), or an event. It takes usually place in building construction with the intent of designing, costing, acquiring, constructing, or maintaining products or other and similar tasks or procedures. Figure 5.1.3.9.A illustrates process relationships.

Process information relates to other objects by establishing the following relationships:

• Nesting of processes : IfcRelNests - A process can contain sub processes and thereby be nested.
• Sequencing of processes : IfcRelSequence - Processes can be placed in sequence (including overlapping for parallel tasks), and have predecessors and successors.
• Assigning process to schedules : IfcRelAssignsToControl - Activities such as tasks, and predominately summary tasks, are assigned to a work schedule.
• Having a product assigned to the process as input : IfcRelAssignsToProcess - Products can be assigned as input to a process, such as for construction process planning.
• Having a product assigned to the process as output : IfcRelAssignsToProduct - Products can be assigned as output to a process, such as for construction process planning.
• Having a control assigned to the process as process control : IfcRelAssignsToProcess - Items that act as a control onto the process can be assigned to a process, such as for cost management (a cost item assigned to a work task).
• Having a resource assigned to the process as consumed by the process : IfcRelAssignsToProcess - Items that act as a mechanism to a process, such as labor, material and equipment in cost calculations.

## 5.1.3.9.4 Property sets

• Pset_Risk
• RiskName
• RiskType
• NatureOfRisk
• RiskAssessmentMethodology
• UnmitigatedRiskLikelihood
• UnmitigatedRiskConsequence
• UnmitigatedRiskSignificance
• MitigationPlanned
• MitigatedRiskLikelihood
• MitigatedRiskConsequence
• MitigatedRiskSignificance
• MitigationProposed
• AssociatedProduct
• AssociatedActivity
• AssociatedLocation

## 5.1.3.9.6 Formal representation

ENTITY IfcProcess
ABSTRACT SUPERTYPE OF (ONEOF
(IfcEvent
,IfcProcedure
SUBTYPE OF (IfcObject);
Identification : OPTIONAL IfcIdentifier;
LongDescription : OPTIONAL IfcText;
INVERSE
IsPredecessorTo : SET [0:?] OF IfcRelSequence FOR RelatingProcess;
IsSuccessorFrom : SET [0:?] OF IfcRelSequence FOR RelatedProcess;
OperatesOn : SET [0:?] OF IfcRelAssignsToProcess FOR RelatingProcess;
END_ENTITY;

## 5.1.3.9.7 References

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### 5.1.3.9.8 Changelog

#### 5.1.3.9.8.1 IFC4

• attribute, Identification
• attribute, LongDescription