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5.3.3.9 IfcWorkControl

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ABSTRACT This definition may not be instantiated

5.3.3.9.1 Semantic definition

An IfcWorkControl is an abstract supertype which captures information that is common to both IfcWorkPlan and IfcWorkSchedule.

CHANGE IFC4 Corrected assignment of resources to work control in documentation. Assignment of tasks to work control updated based on changes of task time definitions and the introduction of a summary task. Identifier has been renamed (now Identification) and promoted to supertype IfcControl

A work control may have resources assigned to it. This is handled by the IfcRelAssignsToControl relationship. A work control should also define a context that gives further information about its usage. If no special context information is required then the IfcProject instance as a global context should be used instead. An explicit link between the work control and the IfcProject via IfcRelDeclares should then be provided.

The attribute IfcWorkControl.Purpose is used to define the purpose of either a work schedule or a work plan. In the case of IfcWorkPlan, the purpose attribute can be used to determine if the work plan is for cost estimating, task scheduling or some other defined purpose.

5.3.3.9.2 Entity inheritance

5.3.3.9.3 Attributes

# Attribute Type Description
IfcRoot (4)
IfcObjectDefinition (7)
IfcObject (5)
IfcControl (2)
Click to show 18 hidden inherited attributes
IfcWorkControl (7)
7 CreationDate IfcDateTime

The date that the plan is created.

8 Creators OPTIONAL SET [1:?] OF IfcPerson

The authors of the work plan.

9 Purpose OPTIONAL IfcLabel

A description of the purpose of the work schedule.

10 Duration OPTIONAL IfcDuration

The total duration of the entire work schedule.

11 TotalFloat OPTIONAL IfcDuration

The total time float of the entire work schedule.

12 StartTime IfcDateTime

The start time of the schedule.

13 FinishTime OPTIONAL IfcDateTime

The finish time of the schedule.

Table 5.3.3.9.A

5.3.3.9.4 Property sets

5.3.3.9.5 Concept usage

Concept Usage Description
IfcRoot (2)
IfcObjectDefinition (9)
IfcObject (5)
IfcControl (1)
Click to show 17 hidden inherited concepts
IfcWorkControl (2)
Control Assignment General

From IFC4 onwards the assignment of tasks to the work control is handled by the IfcRelAssignsToControl relationship. IfcRelAssignsTasks as used in previous IFC releases has been deleted and can not be used any longer. Another change in IFC4 is that it is not necessary to assign each task to a work control as it is regarded to be sufficient if the summary task (root task in the task hierarchy defined through IfcRelNests relationships) is assigned to a work control.

This concept can be applied to the following resources:

Property Sets for Objects General

This concept can be applied to the following resources:

Table 5.3.3.9.B

5.3.3.9.6 Formal representation

ENTITY IfcWorkControl
ABSTRACT SUPERTYPE OF (ONEOF
(IfcWorkPlan
,IfcWorkSchedule))
SUBTYPE OF (IfcControl);
CreationDate : IfcDateTime;
Creators : OPTIONAL SET [1:?] OF IfcPerson;
Purpose : OPTIONAL IfcLabel;
Duration : OPTIONAL IfcDuration;
TotalFloat : OPTIONAL IfcDuration;
StartTime : IfcDateTime;
FinishTime : OPTIONAL IfcDateTime;
END_ENTITY;

5.3.3.9.7 References

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5.3.3.9.8 Changelog

5.3.3.9.8.1 IFC4

  • attribute, Duration
  • attribute, CreationDate
  • attribute, FinishTime
  • attribute, UserDefinedControlType
  • attribute, WorkControlType
  • where rule, WR1
  • attribute Duration name, Changed from "Duration" to "TotalFloat"
  • attribute Duration type, Changed from "IfcTimeMeasure" to "IfcDuration"
  • attribute Identifier name, Changed from "Identifier" to "CreationDate"
  • attribute Identifier type, Changed from "IfcIdentifier" to "IfcDateTime"
  • attribute StartTime name, Changed from "StartTime" to "FinishTime"
  • attribute StartTime optional, Changed from "False" to "True"
  • attribute StartTime type, Changed from "IfcDateTimeSelect" to "IfcDateTime"
  • attribute TotalFloat name, Changed from "TotalFloat" to "StartTime"
  • attribute TotalFloat optional, Changed from "True" to "False"
  • attribute TotalFloat type, Changed from "IfcTimeMeasure" to "IfcDateTime"