Specification for IfcProjectMgmtExtension

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

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	IfcChangeOrderStatusEnum IfcCostUseEnum
P	IfcPurchaseOrderStatusEnum
W	IfcWorkOrderStatusEnum

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

B	IfcBudget
C	IfcChangeOrder IfcCostElement IfcCostSchedule
P	IfcProjectOrder IfcPurchaseOrder
R	IfcRelCostsObjects IfcRelNestsCostElements IfcRelNestsCostSchedules
W	IfcWorkOrder

Functions

No Functions defined in this Schema

Schema Semantic Definition

The models in IfcProjectManagementExtension schema are abstract concepts used in project management processes in the general sense. They represent ways, conventions, methods, functions, and tools of how project management is generally performed. Most of the concepts in this schema don’t have physical appearances. These models also support both construction management and facilities management, while the latter two schemas focus on more specific domain processes.

In IFC R2.0, the IfcProjectManagementExtension schema contains models that represent concepts such as budgets, cost estimates (or cost schedules), and project orders including change orders, purchase orders, and work orders.

HISTORY: new schema in IFC Release 2.0
IfcApproval is moved to IfcControlExtension

Type IfcChangeOrderStatusEnum

EXPRESS Definition

Type Semantic Definition

History

New Enumeration in IFC Release 2.0

Enumeration

Proposing

Proposed

Requested

BeingApproved

Planning

WorkStarted

WorkDelayed

WorkDone

UserDefined

NotDefined

Type IfcCostUseEnum

EXPRESS Definition

Type Semantic Definition

History

New Enumeration in IFC Release 2.0

Enumeration

ExtensionOnly

ElementOnly

ElementSetExtensionCalc

ExtensionSetElementCalc

UserDefined

NotDefined

Type IfcPurchaseOrderStatusEnum

EXPRESS Definition

Type Semantic Definition

History

New Enumeration in IFC Release 2.0

Enumeration

Requested

BeingApproved

Issued

Received

ItemsReceived

UserDefined

NotDefined

Type IfcWorkOrderStatusEnum

EXPRESS Definition

Type Semantic Definition

History

New Enumeration in IFC Release 2.0

Enumeration

Requested

BeingApproved

Planning

WorkStarted

WorkDelayed

WorkDone

UserDefined

NotDefined

Class IfcBudget

Fully Attributed View

EXPRESS Definition

Class Semantic Definition

This classes represents a cost budget (i.e. an amount of money available from a source) available for projects. This class also allows tracking the history of the budget uses. The details of budget assignment and usage for multiple projects or plans are not handled in this class. IfcBudget is a subtype of IfcControl.

History

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

Attribute and Relationship Definitions

Superclasses and Subclasses

 IfcRoot
 IfcObject
 IfcControl
 IfcCostSchedule
 IfcBudget

Attributes and Relationships

Attribute type (OPT, DER, INV)		Redefinition (SELF)
	Attribute / Relation		Data or Rel. type	Definition
	BudgetNumber		STRING	The code number for the budget, given by user
OPT	Description		STRING	General description of the budget
OPT	BudgetSource		STRING	Description of the source of the budget
	Balance		IfcCost	the balance available on the budget. This value can also be calculated or derived from its base type IfcCost Schdule attribute values.
	AvailableDate		IfcDateTimeSelect	The date that the budget becomes available
OPT	AvailableDuration		IfcTimeMeasure	The time longevity of the budget
OPT	BaseBudget		IfcBudget	This allows tracking of the current budget status to date compared to the last previous budget.
	UpdateDate		IfcDateTimeSelect	The date that this budet is updated; this allows tracking the budget usage history

Geometry Use Definitions

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

Class IfcChangeOrder

Fully Attributed View

EXPRESS Definition

Class Semantic Definition

IfcChangeOrder represents a change order in a construction project. A change order can reference to the building elements such as walls to be changed through the control relationship (IfcRelControl) provided through IfcObject. A change order can also reference to the design documents that are to be changed. The document(s) that represents the change order itself can also be referenced through the IfcDocumentReference from IfcObject. It also specifies the cost estimate and work plan for the work requested by the change order. In addition to the properties provided by IfcProjectOrder, it also specify information such as change description, reasons for change, requested start time and requested finish time. IfcChangeOrder is a subtype of IfcProjectOrder.

History

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

Attribute and Relationship Definitions

Superclasses and Subclasses

 IfcRoot
 IfcObject
 IfcControl
 IfcProjectOrder
 IfcChangeOrder

Attributes and Relationships

Attribute type (OPT, DER, INV)		Redefinition (SELF)
	Attribute / Relation		Data or Rel. type	Definition
OPT	ChangeDescription		STRING	A general description of the change
OPT	ReasonForChange		STRING	A description of the problem for why a change is needed
OPT	RequestedStartTime		IfcDateTimeSelect	the start date requested for the work of change
OPT	RequestedFinishTime		IfcDateTimeSelect	the finish date requested for the work of change
	DocumentsForChange		SET [0:?] OF IfcDocumentReference	The design, specification, or plan documents that the change needs to be made for.
OPT	CostEstimate		IfcCostSchedule	The cost estimate for the change.
OPT	WorkPlan		IfcWorkPlan	The work plan for the change.
	Status		IfcChangeOrderStatusEnum	The status of the change order.

Geometry Use Definitions

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

Class IfcCostElement

Fully Attributed View

EXPRESS Definition

Class Semantic Definition

IfcCostElement is a cost with context information. It represents goods, services, or the execution of works of a described elemental nature in given conditions. This entity also has the capability of nesting other elements of the same type (i.e. IfcCostElement) through its relationships to IfcRelNestsCostElements.

The relationship to IfcObject through IfcRelCostsObjects specifies the objects to be costed by IfcCostElement instances. The following figure shows a cost element:

History

New Class in IFC Release 2.0
: This class was introduced in IFC Release 1.5.
ISSUES: None.

Attribute and Relationship Definitions

Superclasses and Subclasses

 IfcRoot
 IfcObject
 IfcControl
 IfcCostElement

Attributes and Relationships

Attribute type (OPT, DER, INV)		Redefinition (SELF)
	Attribute / Relation		Data or Rel. type	Definition
OPT	Description		STRING	General description of the cost element.
	ContextDescription		STRING	The contextual information of the cost such as purchase cost, installation cost, consulting cost, etc.
OPT	ElementCost		IfcCost	The cost of a single item of each 'Quantity'. It can be either a unit cost or an item cost depending on the context of the cost element.
OPT	ExtensionCost		IfcCost	The summarized the cost of this cost element.
	CostUse		IfcCostUseEnum	Indicates how the value of the ElementCost and ExtensionCost is provided and thus how they should be used.
OPT	PreparedOn		IfcDateTimeSelect	The date that the cost is provided.
OPT	Quantity		IfcMeasureWithUnit	Indicates the quantity of the items refered by the cost element.
INV	CostSchedule		IfcCostSchedule	A reference to the cost schedule that the cost element belongs to.

Formal Propositions

WR41	Restrict the relationship 'Nests' inherited from IfcObject to IfcRelNestsCostElement.
	SIZEOF(QUERY(temp <* SELF\IfcObject.Nests | NOT('IFCPROCESSEXTENSION.IFCRELNESTSCOSTELEMENTS' IN TYPEOF(temp)))) = 0
WR42	Restrict the relationship 'IsNestedBy' inherited from IfcObject to IfcRelNestsCostElement.
	SIZEOF(QUERY(temp <* SELF\IfcObject.IsNestedBy | NOT('IFCPROCESSEXTENSION.IFCRELNESTSCOSTELEMENTS' IN TYPEOF(temp)))) = 0
WR43	SIZEOF(QUERY(temp <* SELF\IfcControl.Controls | NOT('IFCPROJECTMGMTEXTENSION.IFCRELCOSTSOBJECTS' IN TYPEOF(temp)))) = 0

Geometry Use Definitions

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

Class IfcCostSchedule

Fully Attributed View

EXPRESS Definition

Class Semantic Definition

IfcCostSchedule is a class that contains a list of cost elements. It provides information such as a total cost, description and title of the cost schedule, a date when it is prepared and persons who prepared it. In IFC R2.0, it is used to represent a cost estimate and provide a super-type for IfcBudget. The following figure shows how a cost schedule would be used to present cost data.

History

New Class in IFC Release 2.0
: This class was introduced in IFC Release 1.5.
ISSUES: None.

Attribute and Relationship Definitions

Superclasses and Subclasses

 IfcRoot
 IfcObject
 IfcControl
 IfcCostSchedule
 IfcBudget

Attributes and Relationships

Attribute type (OPT, DER, INV)		Redefinition (SELF)
	Attribute / Relation		Data or Rel. type	Definition
	Title		STRING
OPT	SubmittedBy		IfcActorSelect
	ApprovedBy		SET [0:?] OF IfcActorSelect
	PreparedBy		IfcActorSelect
OPT	SubmittedOn		IfcDateTimeSelect
	TotalCost		IfcCost	the total cost on the schedule
	CostElements		LIST [0:?] OF IfcCostElement

Formal Propositions

WR1	Restrict the relationship 'Nests' inherited from IfcObject to IfcRelNestsCostSchedules.
	SIZEOF(QUERY(temp <* SELF\IfcObject.Nests | NOT('IFCPROJECTMGMTEXTENSION.IFCRELNESTSCOSTSCHEDULES' IN TYPEOF(temp)))) = 0
WR2	Restrict the relationship 'IsNestedBy' inherited from IfcObject to IfcRelNestsCostSchedules.
	SIZEOF(QUERY(temp <* SELF\IfcObject.IsNestedBy | NOT('IFCPROJECTMGMTEXTENSION.IFCRELNESTSCOSTSCHEDULES' IN TYPEOF(temp)))) = 0

Geometry Use Definitions

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

Class IfcProjectOrder

Fully Attributed View

EXPRESS Definition

Class Semantic Definition

This class represents common properties for project orders issued in a construction or facilities management project. The types of properties include a project order number, a general description, issuing date and company, the person who issued the project order, etc. The types of project orders handled in this release are change orders, purchase orders, and work orders. IfcProjectOrder is a subtype of IfcControl.

History

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

Attribute and Relationship Definitions

Superclasses and Subclasses

 IfcRoot
 IfcObject
 IfcControl
 IfcProjectOrder
 IfcChangeOrder
 IfcPurchaseOrder
 IfcWorkOrder

Attributes and Relationships

Attribute type (OPT, DER, INV)		Redefinition (SELF)
	Attribute / Relation		Data or Rel. type	Definition
	OrderNo		STRING	The identification ID of the purchase order
OPT	Description		STRING	A general description of the project order
OPT	TransactionCode		STRING	Transaction code
	IssuingDate		IfcDateTimeSelect	The date that the order is issued
	IssuingCompany		IfcOrganization	the compancy that issues the project order
	IssuedBy		IfcActorSelect	the person who issued the change order
	IssuedTo		SET [0:?] OF IfcActorSelect	the persons or companies that receives the orders. E.g. for purchase order, this represents the suppliers or dealers.
	AdditionalContacts		SET [0:?] OF IfcActorSelect	Additional contact person regarding the request.
OPT	Remark		STRING	Any general remark comment

Geometry Use Definitions

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

Class IfcPurchaseOrder

Fully Attributed View

EXPRESS Definition

Class Semantic Definition

A set of properties for purchase orders in a project.

History

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

Attribute and Relationship Definitions

Superclasses and Subclasses

 IfcRoot
 IfcObject
 IfcControl
 IfcProjectOrder
 IfcPurchaseOrder

Attributes and Relationships

Attribute type (OPT, DER, INV)		Redefinition (SELF)
	Attribute / Relation		Data or Rel. type	Definition
OPT	RequiredDate		IfcDateTimeSelect	the required date of receiving the requested items
OPT	ScheduledDate		IfcDateTimeSelect	the scheduled date of receiving the requested items
OPT	ActualDate		IfcDateTimeSelect	actual date of receiving the purchased items
OPT	IsFOB		BOOLEAN	is Free of Board?; True means 'yes'; False means 'not'
OPT	ShipMethod		STRING	method of shipping
OPT	PurchaseItems		IfcCostSchedule	Use a cost schedule to handle the list of items with both item description and cost of each cost element in the cost schedule.
OPT	TotalCost		IfcCost	total cost of the purchase. It is derived value from 'PurchaseItems'
	Status		IfcPurchaseOrderStatusEnum	The status of the purchase order
OPT	BudgetSource		IfcBudget	The source of the budget the costs will be out from for the purchase

Geometry Use Definitions

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

Class IfcRelCostsObjects

Fully Attributed View

EXPRESS Definition

Class Semantic Definition

This entity establishes a one-to-many relationship between IfcCostElement and IfcObject, so that an instance of IfcCostElement can be associated with instances of IfcObject. In IFCs all object cost information is provided through this objectified relationship. IfcRelCostsObjects is a subtype of IfcRelControls.

History

New Class in IFC Release 2.0
: This class is a new class in IFC Release 2.0.
ISSUES: None.

Attribute and Relationship Definitions

Superclasses and Subclasses

 IfcRoot
 IfcRelationship
 IfcRelControls
 IfcRelCostsObjects

Attributes and Relationships

No attributes defined on this level.

Formal Propositions

WR41	The relating control object shall be of type IfcCostElement.
	'IFCPROJECTMGMTEXTENSION.IFCCOSTELEMENT' IN TYPEOF (SELF\IfcRelControls.RelatingControl)

Informal Propositions

IP31	The IfcRelControls relationship shall be defined acyclic.

Geometry Use Definitions

This class has no geometry representation.

Class IfcRelNestsCostElements

Fully Attributed View

EXPRESS Definition

Class Semantic Definition

This entity provides a model mechanism to allow IfcCostElement to contain other items of the same type. It provides the relationships between the nesting IfcCostElement and nested IfcCostElement(s). It is a subtype of IfcRelNests.

The next figure shows how cost elements can be grouped into one element, represented by cost elements being nested within another cost element (using the IfcRelNestsCostElements objectified relationship).

History

New Class in IFC Release 2.0
: This class was introduced in IFC Release 1.5.
ISSUES: None.

Attribute and Relationship Definitions

Superclasses and Subclasses

 IfcRoot
 IfcRelationship
 IfcRelNests
 IfcRelNestsCostElements

Attributes and Relationships

Attribute type (OPT, DER, INV)		Redefinition (SELF)
	Attribute / Relation		Data or Rel. type	Definition
OPT	Description		STRING
OPT	Criteria		STRING	Criteria for nesting the cost elements.

Formal Propositions

WR41	Nesting item must be of type IfcCostElement
	'IFCPROJECTMGMTEXTENSION.IFCCOSTELEMENT' IN TYPEOF(SELF\IfcRelNests.RelatingObject)
WR42	Nested items must be of type IfcCostElement
	SIZEOF(QUERY(temp <* SELF\IfcRelNests.RelatedObjects | NOT ('IFCPROJECTMGMTEXTENSION.IFCCOSTELEMENT' IN TYPEOF(temp)))) = 0

Informal Propositions

IP31	The IfcRelNests relationship shall be defined acyclic.

Geometry Use Definitions

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

Class IfcRelNestsCostSchedules

Fully Attributed View

EXPRESS Definition

Class Semantic Definition

History

New Class in IFC Release 2.0

Attribute and Relationship Definitions

Superclasses and Subclasses

 IfcRoot
 IfcRelationship
 IfcRelNests
 IfcRelNestsCostSchedules

Attributes and Relationships

Attribute type (OPT, DER, INV)		Redefinition (SELF)
	Attribute / Relation		Data or Rel. type	Definition
OPT	Description		STRING
OPT	Criteria		STRING	Criteria for nesting cost schedules.

Formal Propositions

WR1	Nesting object must be of type IfcCostSchedule.
	('IFCPROJECTMGMTEXTENSION.IFCCOSTSCHEDULE' IN TYPEOF(SELF\IfcRelNests.RelatingObject))
WR2	Nesting objects must be of type IfcCostSchedule.
	SIZEOF(QUERY(temp <* SELF\IfcRelNests.RelatedObjects | NOT('IFCPROJECTMGMTEXTENSION.IFCCOSTSCHEDULE' IN TYPEOF(temp)))) = 0

Informal Propositions

IP31	The IfcRelNests relationship shall be defined acyclic.

Class IfcWorkOrder

Fully Attributed View

EXPRESS Definition

Class Semantic Definition

IfcWorkOrder represents a work order requested to accomplish a construction or a maintenance work. It contains information about the building components that require the work (by the control relationship, i.e. IfcRelControl, through IfcObject), descriptions of the job, work type, contractual type, requested or actual start and finish time, a cost estimate to the work order, a work plan for the work required, and a budget source for the work. IfcWorkOrder is a subtype of IfcProjectOrder.

History

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

Attribute and Relationship Definitions

Superclasses and Subclasses

 IfcRoot
 IfcObject
 IfcControl
 IfcProjectOrder
 IfcWorkOrder

Attributes and Relationships

Attribute type (OPT, DER, INV)		Redefinition (SELF)
	Attribute / Relation		Data or Rel. type	Definition
OPT	ProductDescription		STRING	A textual description of the products that require the work.
	ShortJobDescription		STRING	short description of the job requested
OPT	LongJobDescription		STRING	description of the job requested
OPT	WorkTypeRequested		STRING	work task type requested
OPT	ContractualType		STRING	the contractual type of the work
OPT	IfNotAccomplished		STRING	comments if the job is not accomplished
OPT	RequestedStartTime		IfcDateTimeSelect
OPT	RequestedFinishTime		IfcDateTimeSelect
OPT	ActualStartTime		IfcDateTimeSelect
OPT	ActualFinishTime		IfcDateTimeSelect
OPT	CostEstimate		IfcCostSchedule	Total estimated cost. Use IfcCostSchedule to handle the detailed contexts of each cost item.
OPT	WorkPlan		IfcWorkPlan	The work plan made for the work required by the work order
OPT	BudgetSource		IfcBudget	the budget source requested
	Status		IfcWorkOrderStatusEnum	the status of the work order in relation to work required

Geometry Use Definitions

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