View source for IFC - Industry Foundation Classes/IFC concepts/IFC building operations concepts

== A procedure may be constrained to only be performed at certain types ==

<!--
digraph {
  node [ shape=rect, color=lightblue ];
  edge [ fontsize=10 ];
  IfcRelAssignsToControl [color=pink]
  IfcRelAssignsToControl -> IfcProcedure [label="RelatedObjects"]
  IfcRelAssignsToControl -> IfcWorkCalendar [label="RelatingControl"]
  
  IfcProcedure -> Reset [label="Name"]
  Reset [shape=ellipse, label="Reset alarm"]
  IfcWorkCalendar -> Night [label="Name"]
  Night [shape=ellipse]
}
-->

[[File:Ifc-concept-sequence-procedure-calendar.png]]

A calendar may constrain when a procedure can be performed. In this example, the alarm may only be reset during the night. These night hours are defined by the calendar.

Source: IfcProcedure