7.3.3.8 IfcConstructionResourceType
ABSTRACT This definition may not be instantiated
7.3.3.8.1 Semantic definition
IfcConstructionResourceType is an abstract generalization of the different resource types used in construction projects, mainly labor, material, equipment and product resource types, plus subcontracted resource types and aggregations such as a crew resource type.
A resource type represents a model of "use of something" and does not necessarily correspond to a specific type of object such as a person or vehicle, but represents possible usages of such objects such as general labor or an equipment fleet. A resource type can either represent usage in general (consumption attributes defined but no task type assignment) or a task-specific resource type (production attributes defined and having an IfcTask assignment).
A construction resource type captures common productivities and cost rates for applying resources to particular task types.
Composition use definition
Resource types may be decomposed into nested resource types indicating productivities when applying the resource to specific task types using the IfcRelNests relationship where IfcRelNests.RelatingObject refers to the general resource type and IfcRelNests.RelatedObjects refers to one or more task-specific productivities. For example, an IfcLaborResourceType may be defined for "Carpenter" which may have a nested IfcLaborResourceType for "Carpenter - Wall Framing" and another nested IfcLaborResourceType for "Carpenter - Drywall", each of which may have productivities based according to specific task types (IfcTaskType).
Assignment use definition
Resource types may be assigned to process types (IfcTypeProcess subtypes) using the IfcRelAssignsToProcess relationship as shown in Figure 7.3.3.8.A. Such relationship indicates that the resource type applies to the process type for the use indicated (e.g. IfcTaskType.PredefinedType). Such relationship enables a scenario of placing an IfcProduct of a particular IfcTypeProduct, querying for a set of IfcTypeProcess process types for constructing such product (e.g. IfcTaskTypeEnum.CONSTRUCTION), querying each IfcTypeProcess for a set of IfcTypeResource resource types for carrying out the process, and finally choosing an IfcTypeProcess and IfcTypeResource combination resulting in the shortest time for instantiated IfcTask occurrence(s) and/or lowest-cost for instantiated IfcConstructionResource occurrence(s).
7.3.3.8.2 Entity inheritance
7.3.3.8.3 Attributes
| # | Attribute | Type | Description |
|---|---|---|---|
| IfcRoot (4) | |||
| 1 | GlobalId | IfcGloballyUniqueId |
Assignment of a globally unique identifier within the entire software world. |
| 2 | OwnerHistory | OPTIONAL IfcOwnerHistory |
Assignment of the information about the current ownership of that object, including owning actor, application, local identification and information captured about the recent changes of the object, |
| 3 | Name | OPTIONAL IfcLabel |
Optional name for use by the participating software systems or users. For some subtypes of IfcRoot the insertion of the Name attribute may be required. This would be enforced by a where rule. |
| 4 | Description | OPTIONAL IfcText |
Optional description, provided for exchanging informative comments. |
| IfcObjectDefinition (7) | |||
| HasAssignments | SET [0:?] OF IfcRelAssigns FOR RelatedObjects |
Reference to the relationship objects, that assign (by an association relationship) other subtypes of IfcObject to this object instance. Examples are the association to products, processes, controls, resources or groups. |
|
| Nests | SET [0:1] OF IfcRelNests FOR RelatedObjects |
References to the decomposition relationship being a nesting. It determines that this object definition is a part within an ordered whole/part decomposition relationship. An object occurrence or type can only be part of a single decomposition (to allow hierarchical structures only). |
|
| IsNestedBy | SET [0:?] OF IfcRelNests FOR RelatingObject |
References to the decomposition relationship being a nesting. It determines that this object definition is the whole within an ordered whole/part decomposition relationship. An object or object type can be nested by several other objects (occurrences or types). |
|
| HasContext | SET [0:1] OF IfcRelDeclares FOR RelatedDefinitions |
References to the context providing context information such as project unit or representation context. It should only be asserted for the uppermost non-spatial object. |
|
| IsDecomposedBy | SET [0:?] OF IfcRelAggregates FOR RelatingObject |
References to the decomposition relationship being an aggregation. It determines that this object definition is whole within an unordered whole/part decomposition relationship. An object definition can be aggregated by several other objects (occurrences or parts). |
|
| Decomposes | SET [0:1] OF IfcRelAggregates FOR RelatedObjects |
References to the decomposition relationship being an aggregation. It determines that this object definition is a part within an unordered whole/part decomposition relationship. An object definition can only be part of a single decomposition (to allow hierarchical structures only). |
|
| HasAssociations | SET [0:?] OF IfcRelAssociates FOR RelatedObjects |
Reference to the relationship objects, that associates external references or other resource definitions to the object. Examples are the association to library, documentation or classification. |
|
| IfcTypeObject (3) | |||
| 5 | ApplicableOccurrence | OPTIONAL IfcIdentifier |
The attribute optionally defines the data type of the occurrence object, to which the assigned type object can relate. If not present, no instruction is given to which occurrence object the type object is applicable. The following conventions are used:
|
| 6 | HasPropertySets | OPTIONAL SET [1:?] OF IfcPropertySetDefinition |
Set of unique property sets, that are associated with the object type and are common to all object occurrences referring to this object type. |
| Types | SET [0:1] OF IfcRelDefinesByType FOR RelatingType |
Reference to the relationship IfcRelDefinesByType and thus to those occurrence objects, which are defined by this type. |
|
| IfcTypeResource (4) | |||
| 7 | Identification | OPTIONAL IfcIdentifier |
An identifying designation given to a resource type. |
| 8 | LongDescription | OPTIONAL IfcText |
A long description, or text, describing the resource in detail. |
| 9 | ResourceType | OPTIONAL IfcLabel |
The type denotes a particular type that indicates the resource further. The use has to be established at the level of instantiable subtypes. In particular it holds the user defined type, if the enumeration of the attribute PredefinedType is set to USERDEFINED. |
| ResourceOf | SET [0:?] OF IfcRelAssignsToResource FOR RelatingResource |
Set of relationships to other objects, e.g. products, processes, controls, resources or actors to which this resource type is a resource. |
|
| Click to show 18 hidden inherited attributes Click to hide 18 inherited attributes | |||
| IfcConstructionResourceType (2) | |||
| 10 | BaseCosts | OPTIONAL LIST [1:?] OF IfcAppliedValue |
Indicates the unit costs and environmental impacts for which accrued amounts should be calculated. Such unit costs may be split into Name designations (e.g. 'Standard', 'Overtime'), and may contain a hierarchy of cost values that apply at different dates (using IfcCostValue.ApplicableDate and IfcCostValue.FixedUntilDate). |
| 11 | BaseQuantity | OPTIONAL IfcPhysicalQuantity |
Identifies the quantity for which the BaseQuantityProduced applies. The Name of the IfcPhysicalQuantity identifies the quantity definition being measured, e.g. "GrossVolume". For production-based resources (e.g. carpentry labor), this value refers to quantities on IfcProduct(s) to which the assigned IfcTask is assigned. For duration-based resources (e.g. safety inspector, fuel for equipment), this value refers to quantities that may be assigned to occurrences of the assigned IfcTaskType. |
7.3.3.8.4 Property sets
-
Pset_ConstructionResource
- ScheduleWorkProgression
- ActualWorkTime
- RemainingWorkProgression
- ScheduleCost
- ActualCost
- RemainingCost
- ScheduleCompletion
- ActualCompletion
7.3.3.8.5 Concept usage
| Concept | Usage | Description | |
|---|---|---|---|
| IfcRoot (2) | |||
| Revision Control | General |
Ownership, history, and merge state is captured using IfcOwnerHistory. |
|
| Software Identity | General |
IfcRoot assigns the globally unique ID. In addition it may provide for a name and a description about the concept. |
|
| IfcObjectDefinition (9) | |||
| Classification Association | General |
Any object occurrence or object type can have a reference to a specific classification reference, i.e. to a particular facet within a classification system. |
|
| Aggregation | General |
No description available. |
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| Approval Association | General |
No description available. |
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| Constraint Association | General |
No description available. |
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| Document Association | General |
No description available. |
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| Library Association | General |
No description available. |
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| Material Association | General |
No description available. |
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| Material Single | General |
No description available. |
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| Nesting | General |
No description available. |
|
| IfcTypeObject (2) | |||
| Object Type Predefined Type | General |
No description available. |
|
| Property Sets for Types | General |
No description available. |
|
| Click to show 13 hidden inherited concepts Click to hide 13 inherited concepts | |||
| IfcConstructionResourceType (1) | |||
| Property Sets for Objects | General |
This concept can be applied to the following resources: |
|
7.3.3.8.6 Formal representation
ENTITY IfcConstructionResourceType
ABSTRACT SUPERTYPE OF (ONEOF
(IfcConstructionEquipmentResourceType
,IfcConstructionMaterialResourceType
,IfcConstructionProductResourceType
,IfcCrewResourceType
,IfcLaborResourceType
,IfcSubContractResourceType))
SUBTYPE OF (IfcTypeResource);
BaseCosts : OPTIONAL LIST [1:?] OF IfcAppliedValue;
BaseQuantity : OPTIONAL IfcPhysicalQuantity;
END_ENTITY;