Specification for IfcConstructionMgmtDomain

EXPRESS Definition

EXPRESS-G Diagram

Table of contents

• Schema Semantic Definition
• Simple Types
• Select Types
• Enumerations
• Class Definitions
• Functions

Simple Types

No Simple Types defined in this Schema

Select Types

No Select Types defined in this Schema

Enumerations

No Enumerations defined in this Schema

Class Definitions

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

C	IfcCMDocPackage IfcConstructionEquipmentResource IfcConstructionMaterialResource IfcConstructionZoneAggregationProduct IfcCrewResource
L	IfcLaborResource
P	IfcProductResource
R	IfcRelAggregatesCrewResources
S	IfcSubcontractResource

Functions

No Functions defined in this Schema

Schema Semantic Definition

The IfcConstructionManagement Schema contains defined types and classes that capture concepts and data requirements for construction management processes. They, together with models defined in IfcProcessExtension and IfcProjectMangementExtension, provide a set of model elements that support typical construction management applications and their integration.

In R2.0, most of the classes included in this schema are used to represent different types of construction resources that can support both cost estimating and work planning, and their integration.

HISTORY: renamed from schema IfcCostEstimatingDomain in R1.5.1.

Class IfcCMDocPackage

Fully Attributed View

EXPRESS Definition

Class Semantic Definition

IfcCMDocPackage is a class that represents a collection of construction management related objects (e.g. construction documents) in one place. It gathers all of the related construction objects of different types as one package. It can be used to track and allocation a specific construction management object quickly. An instance of IfcCMDocPackage doesn’t contain the objects directly; rather, it keeps all the references of the objects and maintain the linages to the objects. IfcCMDocPackage is a subtype of IfcControl.

History

New Class in IFC Release 2.0
: {{new class in IFC Release R2.0 }}
ISSUE:

Attribute and Relationship Definitions

Superclasses and Subclasses

 IfcRoot
 IfcObject
 IfcControl
 IfcCMDocPackage

Attributes and Relationships

Attribute type (OPT, DER, INV)		Redefinition (SELF)
	Attribute / Relation		Data or Rel. type	Definition
	DocPackageID		STRING	The identifier of the construction management project package given by user.
	DocPackageName		STRING	The name of the construction management project package given by user.
OPT	Description		STRING	General description of the construction management project package.
	CreationDate		IfcDateTimeSelect	The date that the package is created.
	Authors		SET [0:?] OF IfcActorSelect	The authors of the package
	Approvals		SET [0:?] OF IfcApproval	References to the relevant instances of IfcApproval that relate to construction management in the project
	WorkPlans		SET [0:?] OF IfcWorkPlan	The task schedules for the project project
	CostEstimates		SET [0:?] OF IfcCostSchedule	The cost estimates for the project project
	WorkOrders		SET [0:?] OF IfcWorkOrder	Work orders generated in the project
	PurchaseOrders		SET [0:?] OF IfcPurchaseOrder	Purchase orders generated in the project
	ChangeOrders		SET [0:?] OF IfcChangeOrder	Change orders generated in the project for change of work.
	Documents		SET [0:?] OF IfcDocumentReference	All the file documents required and generated for the project
	BudgetSources		SET [0:?] OF IfcBudget

Geometry Use Definitions

{{ Instances of this class have no physical presence and therefore no geometric representation.}}

Class IfcConstructionEquipmentResource

Fully Attributed View

EXPRESS Definition

Class Semantic Definition

IfcConstructionEquipmentResource represents types of construction equipment which occurrances are used as resources in a construction process. Equipment resources are wholly or partially consumed, or occupied (i.e. used) in the performance of construction processes (i.e. IfcWorkTask). IfcConstructionEquipmentResource is not the same as IfcEquipment; the former represents a type of construction equipment that can be used to aid in perfoming a work task, while the latter represents equipment pieces that are part of the building as a final product of building element. IfcConstructionEquipmentResource is a subtype of IfcResource.

History

New Class in IFC Release 2.0
: new class in IFC Release R2.0
ISSUE:

Attribute and Relationship Definitions

Superclasses and Subclasses

 IfcRoot
 IfcObject
 IfcResource
 IfcConstructionEquipmentResource

Attributes and Relationships

Attribute type (OPT, DER, INV)		Redefinition (SELF)
	Attribute / Relation		Data or Rel. type	Definition
OPT	EquipmentModel		STRING	The model of the type of equipment.
OPT	Manufacturer		IfcOrganization	The manufacturer that produces this type of equipment.

Geometry Use Definitions

Instances of this class have no physical presence and therefore no geometric representation.

Class IfcConstructionMaterialResource

Fully Attributed View

EXPRESS Definition

Class Semantic Definition

IfcConstructionMaterialResource represents material resource types in a construction project. Their occurrences are consumed (wholly or partially), or occupied during a construction work task (i.e. IfcWorkTask).

Similar to IfcProductResource, sometimes things such as 5 tons of gravals are already instantiated as an IfcProduct because it is a result of a work task e.g. ‘transporting gravals’. In this case, the instance of resource IfcConstructionMaterialResource can be associated with the product instance ‘5 tons of gravals’ to provide more information for resource uses. Nevertheless, IfcConstructionMaterialResource should only be used to represent resource types, e.g. ‘graval’, but not product substances, e.g. ‘5 tons of graval’. IfcConstructionMaterialResource is a subtype of IfcResource.

NOTE that this class is not the same as IfcMaterial; the former can typically represent the type of bulk materials such as sand, gravals, nails and so on (note these can be instantiated from IfcProduct as well depending their uses in the system) used in a construction process. The latter is about physical materials used in a physical building element typically with detailed positioning (e.g. offset) and layering information.

History

New Class in IFC Release 2.0
: new class in IFC Release R2.0
ISSUE:

Attribute and Relationship Definitions

Superclasses and Subclasses

 IfcRoot
 IfcObject
 IfcResource
 IfcConstructionMaterialResource

Attributes and Relationships

Attribute type (OPT, DER, INV)		Redefinition (SELF)
	Attribute / Relation		Data or Rel. type	Definition
	Suppliers		SET [0:?] OF IfcOrganization	Possible suppliers of the type of materials.
OPT	OrderQuantity		IfcMeasureWithUnit	The basic quantity for ordering.
	MaterialProducts		SET [0:?] OF IfcProduct	The products that are produced from other work tasks, but used as the materials.
	DesignMaterial		SET [0:?] OF IfcMaterial	the materials specified by the design process that needs to be procured in the construction processes as the resource.

Geometry Use Definitions

Instances of this class have no physical presence and therefore no geometric representation.

Class IfcConstructionZoneAggregationProduct

Fully Attributed View

EXPRESS Definition

Class Semantic Definition

IfcConstructionZoneAggregationProduct can be used to represent two concepts: one is a construction zone, and the other is a construction aggregation area. It is defined for use by construction cost estimating and scheduling.

A construction zone allows for the grouping of products into a single product element. A defined zone that includes multiple products (i.e. IfcProduct), to which a work task or a group of work tasks takes place or a cost estimate is calculated. In particular, where work may need to be planned to e.g. build all the columns on the 2^nd floor. For its intended use (i.e. cost estimating and work planning), IfcConstructionZoneAggregationProduct should be a type of product since it must be considered to be an output result of a process that requires resources to produce this ‘product’.

A construction aggregation is a defined area on a product (i.e. IfcProduct) representing a part of the product, to which a work task or a group of work tasks takes place or a cost estimate is calculated.

The construction aggregation allows for the breakdown of work into more atomic elements for costing. In particular, where work may need to be done in several parts e.g. the building of a single wall which may be done in several 'lifts' or the casting of a slab where the slab may comprise several regional casts. It should be a type of product since it must be considered to be an output result of a process that requires certain resources.

History

New Class in IFC Release 2.0
: {{new class in IFC Release R2.0 }}
ISSUE:

Attribute and Relationship Definitions

Superclasses and Subclasses

 IfcRoot
 IfcObject
 IfcProduct
 IfcConstructionZoneAggregationProduct

Attributes and Relationships

Attribute type (OPT, DER, INV)		Redefinition (SELF)
	Attribute / Relation		Data or Rel. type	Definition
	ID		STRING	The identity given to a construction zone or aggregation product.
OPT	Name		STRING	The name of the construction zone or aggregation.
OPT	Description		STRING	The description of the construction zone or aggregation.
	ZoneNotAggregation		BOOLEAN	Indicates whether the object is a zone product or aggregation product. If the value is TRUE, it means it is a zone; otherwise it is an aggregation product type.
OPT	SelectionCriteria		STRING	Specification requirements applying to a construction zone or aggregation.
OPT	PartOfProduct		IfcProduct	The reference product that the aggregation is part of.
	CoveredProducts		SET [0:?] OF IfcProduct	The references of products that the construction zone covers.

Geometry Use Definitions

{{ Instances of this class have no physical presence and therefore no geometric representation.}}

Class IfcCrewResource

Fully Attributed View

EXPRESS Definition

Class Semantic Definition

IfcCrewResource represents a type of resource used in construction processes, i.e. construction crew resource. A construction crew resource typically includes labor resource, equipment resource, material resource, subcontractor resource, as well as other crew resources. Construction crew resources are partially or wholly consumed, or occupied in a construction process (i.e. IfcWorkTask). Since IfcCrewResource represents the resource types, individual persons are not required to be identified and linked to the crew resource, while they can be associated if needed. IfcCrewResource is a subtype of IfcResource.

NOTE that the IfcCrewResource is enabled to contain other crew resource types (i.e. crew resource type nesting) through its relationship to IfcRelCrewContainsResources. The WHERE constraints of the entity define the mechanism of how this nesting can be achieved.

Also note that in practice, when defining a crew resource type, a set of process types that the crew type is suitable for, are also identified. Since IFC R2.0 doesn’t handle process types (IfcProcess represents process occurrences) explicitly, this relationship is not handled in R2.0.

Additionally, the term ‘crew resource’ is used as a standard term for the kind of resources described in North America. This requirement is based on the IAI project ‘Cost Estimating’ defined in North America Project Management Domain committee. It is acknowledged that this term may not be a popular term in the construction management industries in other countries. The class can be considered to be renamed when more projects are defined to provide such requirements.

History

New Class in IFC Release 2.0
: {{new class in IFC Release R2.0 }}
ISSUE:

Attribute and Relationship Definitions

Superclasses and Subclasses

 IfcRoot
 IfcObject
 IfcResource
 IfcCrewResource

Attributes and Relationships

Attribute type (OPT, DER, INV)		Redefinition (SELF)
	Attribute / Relation		Data or Rel. type	Definition
INV	RequiresResources		IfcRelAggregatesCrewResources	Any other resources required in the crew resource.

Geometry Use Definitions

{{ Instances of this class have no physical presence and therefore no geometric representation.}}

Class IfcLaborResource

Fully Attributed View

EXPRESS Definition

Class Semantic Definition

IfcLaborResource represents labor resource types used in a construction work task (i.e. IfcWorkTask). It implies a type of labor with particular skills or crafts required to perform certain type of construction or management related work. Therefore, labor resource types typically do not identify individual persons (i.e. IfcActors) for cost estimating purpose. IfcLaborResource is a subtype of IfcResource.

History

New Class in IFC Release 2.0
: new class in IFC Release R2.0
ISSUE:

Attribute and Relationship Definitions

Superclasses and Subclasses

 IfcRoot
 IfcObject
 IfcResource
 IfcLaborResource

Attributes and Relationships

Attribute type (OPT, DER, INV)		Redefinition (SELF)
	Attribute / Relation		Data or Rel. type	Definition
	Title		STRING	The title of the type of labor such as carpenter, crane operator, superintendent, etc.
	SkillSet		SET [0:?] OF STRING	The skill set required for this type of labor.

Geometry Use Definitions

Instances of this class have no physical presence and therefore no geometric representation.

Class IfcProductResource

Fully Attributed View

EXPRESS Definition

Class Semantic Definition

IfcProductResource represents a type of construction resource, that is, product resources. Product resources are roles of products that are consumed (wholly or partially), or occupied (i.e. used) in the performance of a construction work task. Occurrences of products that are used as product resources are onece instances of IfcProduct since they are resulted from some processes. For instance, formworks can be instantiated as products resulted from process ‘constructing formwork’. However, they become to be used as resources in process ‘pouring concrete’ in a later stage of the project.

IfcProductResource is modeled as a type of resource (i.e. subtype of IfcResource) that identifies a product linked and that describes how it can be used as a resource through IfcRelResourceUse in a process.

History

New Class in IFC Release 2.0
: new class in IFC Release R2.0
ISSUE:

Attribute and Relationship Definitions

Superclasses and Subclasses

 IfcRoot
 IfcObject
 IfcResource
 IfcProductResource

Attributes and Relationships

Attribute type (OPT, DER, INV)		Redefinition (SELF)
	Attribute / Relation		Data or Rel. type	Definition
OPT	ResourceProduct		IfcProduct	This identifies the product that is being used as the resource

Geometry Use Definitions

Instances of this class have no physical presence and therefore no geometric representation.

 

Class IfcRelAggregatesCrewResources

Fully Attributed View

EXPRESS Definition

Class Semantic Definition

IfcRelRelAggregatesCrewResources is class that enables a construction crew resource type (i.e. IfcCrewResource) to contain other resource types. It specifies the quantity of the included resources in the crew resource. It can also specify the conversion rate of the resource when being included in the resource. IfcRelRelAggregatesCrewResources is a subtype of ifcRelationship.

History

New Class in IFC Release 2.0
: {{new class in IFC Release R2.0 }}
ISSUE:

Attribute and Relationship Definitions

Superclasses and Subclasses

 IfcRoot
 IfcRelationship
 IfcRelAggregatesCrewResources

Attributes and Relationships

Attribute type (OPT, DER, INV)		Redefinition (SELF)
	Attribute / Relation		Data or Rel. type	Definition
	RelatingCrewResource		IfcCrewResource
	RelatedResources		LIST [1:?] OF IfcResource
	RequiredQuantity		REAL
OPT	ConversionRate		IfcMeasureWithUnit	The conversion rate for the resource when being included in the crew resource.

Geometry Use Definitions

{{ Instances of this class have no physical presence and therefore no geometric representation.}}

Class IfcSubcontractResource

Fully Attributed View

EXPRESS Definition

Class Semantic Definition

IfcSubcontractorResource represents a construction resource needed in a construction process. Since it represents a type of sub-contractor, it can be used in cost estimating and work planning without specifying the subcontractor. However, it can be associated with a company that is the actual subcontractor when detailed work planning is performed. The type of subcontractor can also be identified in a construction crew resource. IfcSubcontractorResource is a subtype of IfcResource.

History

New Class in IFC Release 2.0
: new class in IFC Release R2.0
ISSUE:

Attribute and Relationship Definitions

Superclasses and Subclasses

 IfcRoot
 IfcObject
 IfcResource
 IfcSubcontractResource

Attributes and Relationships

Attribute type (OPT, DER, INV)		Redefinition (SELF)
	Attribute / Relation		Data or Rel. type	Definition
	SubcontractResourceID		STRING	The id to identify the subcontract.
OPT	Company		IfcOrganization	The company that the subcontract is signed with.
OPT	JobDescription		STRING	The description of the jobs that this subcontract should complete.

Geometry Use Definitions

Instances of this class have no physical presence and therefore no geometric representation.