#### 5.2.3.1 IfcPerformanceHistory

| Historique de performance
| Leistungsverlauf

IfcPerformanceHistory is used to document the actual performance of an occurrence instance over time. It includes machine-measured data from building automation systems and human-specified data such as task and resource usage. The data may represent actual conditions, predictions, or simulations.

The realtime data tracked by performance history takes the form of property sets where all properties are based on time series. Unlike design-based data at occurrences and types, performance-driven data is time-sensitive and may change in realtime by some measurement device. Data may be captured at irregular intervals such as when values change beyond established thresholds, or at regular intervals of specified duration.

#### Declaration use definition

IfcPerformanceHistory may be declared within a project using IfcRelDeclares where RelatingContext refers to the IfcProject and RelatedDefinitions includes the IfcPerformanceHistory. Default units (used for property sets) are indicated by the declaring project. Only top-level objects are declared; nested performance history objects (through IfcRelNests) do not participate in such relationship.

> HISTORY New entity in IFC2x2.

## Plumbing System Design

Instance diagram

Identity

The Identity concept applies to this entity.

Properties for Performance

The Properties for Performance concept applies to this entity as shown in Table 8.

Exchange |  |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Import |  |  |  |  |  |  |  |  |  |  |  |  |
Export |  |  |  |  |  |  |  |  |  |  |  |  |

Control Assignment

The Control Assignment concept applies to this entity as shown in Table 9.

Type | Description
--- | ---
IfcGroup | A system or zone for which time-based system information is provided, such as overall usage of a water distribution system.
IfcProduct | A building space, physical device, or port for which time-based information is provided, such as water usage at a meter along a piping network.
Table 9 — IfcPerformanceHistory Control Assignment

Exchange |  |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Import |  |  |  |  |  |  |  |  |  |  |  |  |
Export |  |  |  |  |  |  |  |  |  |  |  |  |

XSD Specification:

<xs:element name="IfcPerformanceHistory" type="ifc:IfcPerformanceHistory" substitutionGroup="ifc:IfcControl" nillable="true"/>
<xs:complexType name="IfcPerformanceHistory">
<xs:complexContent>
<xs:extension base="ifc:IfcControl">
<xs:attribute name="LifeCyclePhase" type="ifc:IfcLabel" use="optional"/>
</xs:extension>
</xs:complexContent>
</xs:complexType>

EXPRESS Specification:

ENTITY IfcPerformanceHistory

| SUBTYPE OF (IfcControl);

LifeCyclePhase | : | IfcLabel;
PredefinedType | : | OPTIONAL IfcStrippedOptional;

END_ENTITY;

Attribute Definitions:

LifeCyclePhase | : | Describes the applicable building life-cycle phase. Typical values should be DESIGNDEVELOPMENT, SCHEMATICDEVELOPMENT, CONSTRUCTIONDOCUMENT, CONSTRUCTION, ASBUILT, COMMISSIONING, OPERATION, etc.

Inheritance Graph:

ENTITY IfcPerformanceHistory

| ENTITY IfcRoot

GlobalId | : | IfcGloballyUniqueId;
OwnerHistory | : | OPTIONAL IfcOwnerHistory;
Name | : | OPTIONAL IfcLabel;
Description | : | OPTIONAL IfcText;

| ENTITY IfcObjectDefinition

| INVERSE

HasAssignments | : | SET OF IfcRelAssigns FOR RelatedObjects;
Nests | : | SET [0:1] OF IfcRelNests FOR RelatedObjects;
IsNestedBy | : | SET OF IfcRelNests FOR RelatingObject;
HasContext | : | SET [0:1] OF IfcRelDeclares FOR RelatedDefinitions;
IsDecomposedBy | : | SET OF IfcRelAggregates FOR RelatingObject;
Decomposes | : | SET [0:1] OF IfcRelAggregates FOR RelatedObjects;
HasAssociations | : | SET OF IfcRelAssociates FOR RelatedObjects;

| ENTITY IfcObject

ObjectType | : | OPTIONAL IfcStrippedOptional;

| INVERSE

IsDeclaredBy | : | SET [0:1] OF IfcRelDefinesByObject FOR RelatedObjects;
Declares | : | SET OF IfcRelDefinesByObject FOR RelatingObject;
IsTypedBy | : | SET [0:1] OF IfcRelDefinesByType FOR RelatedObjects;
IsDefinedBy | : | SET OF IfcRelDefinesByProperties FOR RelatedObjects;

| ENTITY IfcControl

Identification | : | OPTIONAL IfcStrippedOptional;

| INVERSE

Controls | : | SET OF IfcRelAssignsToControl FOR RelatingControl;

| ENTITY IfcPerformanceHistory

LifeCyclePhase | : | IfcLabel;
PredefinedType | : | OPTIONAL IfcStrippedOptional;

END_ENTITY;

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